Question 1

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all.
-Human females are born with about 2 million of these cells that entered meiosis but stopped in prophase I.
A)Oogonium
B)Primary oocyte
C)Secondary oocyte
D)Polar body
E)Corpus luteum

Accepted Answer

Primary oocytes are the cells that enter meiosis during fetal development and stop in prophase I. Female babies are born with about 2 million of these cells.

Answer: D
 During oogenesis, a primary oocyte divides unequally to produce a secondary oocyte and a small, non-functional polar body.

Answer: C
 The secondary oocyte is the cell that is ovulated during the menstrual cycle and is capable of being fertilized by a sperm.

Answer: A
 Oogonia are the precursor cells to primary oocytes and undergo mitotic divisions to increase in number during fetal development.

Answer: E
 The corpus luteum is a structure that forms from the remnants of the follicle after ovulation and produces hormones to prepare the uterus for pregnancy. It is not involved in the development of the human egg.

Question 2

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all.
-The male sex cell is fully formed at this stage of development.
A)Spermatogonium
B)Secondary spermatocyte
C)Primary spermatocyte
D)Spermatid
E)Sperm

Accepted Answer

The fifth stage of sperm development is the mature sperm, which is fully formed and ready for fertilization.

Question 3

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all.
-This is a diploid mitotic product that then undergoes meiosis.
A)Spermatogonium
B)Secondary spermatocyte
C)Primary spermatocyte
D)Spermatid
E)Sperm

Accepted Answer

Primary spermatocytes are diploid cells that undergo meiosis to produce two haploid secondary spermatocytes.

Answer: B
 Secondary spermatocytes are haploid cells that are formed from meiosis I of primary spermatocytes.

Answer: D
 Spermatids are haploid cells that are produced from meiosis II of secondary spermatocytes.

Answer: A
 Spermatogonia are diploid cells that divide by mitosis to maintain the stem cell pool in the testis.

Answer: E
 Sperm are mature, haploid cells that are produced from the process of spermiogenesis, which involves the transformation of spermatids into functional sperm cells.

Question 4

Choose the one most appropriate answer for each.
-Placenta
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

The placenta is the organ that supplies the mammalian embryo/fetus with nutrients and removes wastes.

Answer: K
 The inner cell mass plus trophoblast attaches to the uterine wall and is known as the placenta.

Answer: N
 The uterine lining is called the endometrium.

Answer: O
 The hormone that stimulates maturation of an ovarian follicle is called follicle-stimulating hormone (FSH).

Question 5

Choose the one most appropriate answer for each.
-Seminal vesicles
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

Seminal vesicles secrete a fructose-rich fluid that provides energy for sperm.

Answer: K
 The inner cell mass plus trophoblast is the structure that attaches to the uterine wall and forms the placenta.

Answer: H
 The vas deferens is connected to the epididymis by the ductus deferens.

Answer: I
 Oxytocin is a hormone that stimulates smooth muscle contractions in both the male and female reproductive tracts.

Answer: J
 The acrosome is a cap over the head of a sperm that contains lytic enzymes that aid in the penetration of egg membranes.

Answer: L
 Leydig cells in the testis secrete testosterone.

Answer: M
 The clitoris is highly sensitive to sexual stimulation and develops from the same embryonic tissues as does the penis in males.

Answer: N
 The endometrium is the lining of the uterus.

Answer: O
 Follicle-stimulating hormone (FSH) stimulates the maturation of an ovarian follicle.

Question 6

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all.
-This continues to undergo mitosis throughout the reproductive life of the male.
A)Spermatogonium
B)Secondary spermatocyte
C)Primary spermatocyte
D)Spermatid
E)Sperm

Accepted Answer

Spermatogonium continually undergoes mitosis to produce more spermatogonia throughout the reproductive life of the male.

Answer: C
 Primary spermatocytes undergo meiosis I to produce two secondary spermatocytes.

Answer: B
 Secondary spermatocytes undergo meiosis II to produce four haploid spermatids.

Answer: D
 Spermatids undergo spermiogenesis, a process of maturation, to become functional sperm.

Answer: E
 Sperm are the final product of sperm development, resulting from the maturation of spermatids during spermiogenesis.

Question 7

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all.
-This cell becomes the mature egg only after fertilization in humans.
A)Oogonium
B)Primary oocyte
C)Secondary oocyte
D)Polar body
E)Corpus luteum

Accepted Answer

The secondary oocyte is the stage where the egg is capable of being fertilized. It is released from the ovary during ovulation and if fertilized, it can complete meiosis and become a mature egg.

Answer: D
 Polar bodies are a by-product of meiosis in the development of the human egg. They are small cells that lack the ability to be fertilized and eventually disintegrate.

Answer: E
 The corpus luteum is a structure that forms from the ruptured follicle after ovulation. It secretes hormones that prepare the uterus for a potential pregnancy. However, it is not directly involved in the development of the human egg.

Answer: A and B
 Oogonium is the stem cell that gives rise to primary oocytes. Primary oocytes are the earliest stage in the development of the human egg and are present in females at birth. However, neither of these stages are directly involved in the development of the mature egg.

Question 8

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all.
-This represents the product of the first meiotic division.
A)Spermatogonium
B)Secondary spermatocyte
C)Primary spermatocyte
D)Spermatid
E)Sperm

Accepted Answer

The product of the first meiotic division in sperm development is the secondary spermatocyte. This stage follows the primary spermatocyte stage, where the cell undergoes meiosis I to produce two haploid secondary spermatocytes.

Question 9

Choose the one most appropriate answer for each.
-Oxytocin
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

Oxytocin is known for its role in stimulating smooth muscle contractions in the reproductive tracts of both males and females, facilitating processes such as childbirth and ejaculation.

Question 10

Choose the one most appropriate answer for each.
-Clitoris
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

The clitoris is sensitive to sexual stimulation and develops from the same embryonic tissues as does the penis in males.

Answer: B
 The structures that secrete fructose-rich fluid used as sperm energy source are called seminal vesicles.

Answer: C
 The clitoris is not related to the yolk sac or umbilical cord. This answer refers to the allantois, which forms as an outgrowth of the yolk sac and becomes part of the umbilical cord and urinary bladder.

Answer: D
 There is no term or structure in the reproductive system called "clitoris." The term "Thalidomide" refers to a drug that causes severely deformed arms and legs in developing embryos.

Answer: E
 The coiled duct that sperm enter on its way to the vas deferens is called the vas deferens.

Answer: F
 The opening between the uterus and vagina is called the cervix.

Answer: G
 The organ that supplies the mammalian embryo/fetus with nutrients and removes wastes is called the placenta.

Answer: H
 The duct that connects the epididymis with the ejaculatory duct is called the vas deferens.

Answer: I
 The hormone that stimulates smooth muscle contractions in male and female reproductive tracts is called oxytocin.

Answer: J
 The cap over the head of a sperm that contains lytic enzymes to penetrate egg membranes is called the acrosome.

Answer: K
 The inner cell mass plus trophoblast that attaches to the uterine wall is called the blastocyst.

Answer: L
 Testosterone-secreting cells in the testis are called Leydig cells.

Answer: A
 The clitoris does not play a role in triggering ovulation in females. The hormone that triggers ovulation is called luteinizing hormone (LH).

Answer: N
 The uterine lining is called the endometrium.

Answer: O
 The hormone that stimulates maturation of an ovarian follicle is called follicle-stimulating hormone (FSH).

Question 11

Choose the one most appropriate answer for each.
-FSH
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

FSH stimulates maturation of an ovarian follicle.

Answer: B
 Structures that secrete fructose-rich fluid used as sperm energy source are the seminal vesicles.

Answer: C
 The structure that forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder is the allantois.

Answer: D
 There is no matching answer choice for "A drug that causes severely deformed arms and legs in developing embryos."

Answer: H
 The duct that connects epididymis with ejaculatory duct is the vas deferens.

Answer: F
 The opening between uterus and vagina is the cervix.

Answer: G
 The organ that supplies the mammalian embryo/fetus with nutrients and removes wastes is the placenta.

Answer: M
 The structure that is sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males is the clitoris.

Answer: I
 The hormone that stimulates smooth muscle contractions in male and female reproductive tracts is oxytocin.

Answer: J
 The cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes is the acrosome.

Answer: K
 Inner cell mass plus trophoblast; attaches to uterine wall is the blastocyst.

Answer: L
 Testosterone-secreting cells in the testis are the Leydig cells.

Answer: E
 The coiled duct that sperm enter on its way to vas deferens is the epididymis.

Answer: N
 The uterine lining is the endometrium.

Question 12

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all.
-This diploid germ cell produces primary oocytes by mitosis.
A)Oogonium
B)Primary oocyte
C)Secondary oocyte
D)Polar body
E)Corpus luteum

Accepted Answer

The diploid germ cell that produces primary oocytes by mitosis is called the oogonium.

Answer: B
 The primary oocyte is the cell produced by the oogonium that will later develop into an egg.

Answer: C
 The secondary oocyte is the cell produced when the primary oocyte undergoes meiosis I.

Answer: D
 Polar bodies are small cells produced during oogenesis that are eventually discarded.

Answer: E
 The corpus luteum is a temporary structure formed after ovulation that secretes progesterone to support a potential pregnancy. It is not directly involved in the development of the human egg.

Question 13

Choose the one most appropriate answer for each.
-LH
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

LH (luteinizing hormone) acts to trigger ovulation in females.

Answer: B
 Structures that secrete fructose-rich fluid used as sperm energy source are the seminal vesicles.

Answer: C
 The allantois forms as an outgrowth of the yolk sac and becomes part of the umbilical cord and urinary bladder.

Answer: D
 Thalidomide is a drug that causes severely deformed arms and legs in developing embryos.

Answer: E
 Sperm enter the vas deferens through the epididymis, a coiled duct.

Answer: F
 The opening between the uterus and vagina is known as the cervix.

Answer: G
 The organ that supplies the mammalian embryo/fetus with nutrients and removes wastes is the placenta.

Answer: H
 The epididymis connects with the ejaculatory duct.

Answer: I
 Oxytocin is a hormone that stimulates smooth muscle contractions in male and female reproductive tracts.

Answer: J
 The cap over the head of a sperm that contains lytic enzymes to penetrate egg membranes is known as the acrosome.

Answer: K
 The inner cell mass plus trophoblast that attaches to the uterine wall is called the blastocyst.

Answer: L
 Testosterone-secreting cells in the testis are known as Leydig cells.

Answer: M
 The clitoris is sensitive to sexual stimulation and develops from the same embryonic tissues as does the penis in males.

Answer: N
 The uterine lining is also known as the endometrium.

Answer: O
 Follicle-stimulating hormone (FSH) stimulates the maturation of an ovarian follicle.

Question 14

Choose the one most appropriate answer for each.
-Leydig cells
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

Leydig cells refer to testosterone-secreting cells found in the testis.

Answer: B
 The structures that secrete fructose-rich fluid used as sperm energy source are called seminal vesicles.

Answer: C
 The structure that forms from an outgrowth of the yolk sac, becomes part of umbilical cord and urinary bladder is the allantois.

Answer: D
 A drug that causes severely deformed arms and legs in developing embryos is thalidomide.

Answer: E
 The coiled duct that sperm enter on their way to vas deferens is called the ejaculatory duct.

Answer: F
 The opening between uterus and vagina is the cervix.

Answer: G
 The organ that supplies the mammalian embryo/fetus with nutrients and removes wastes is the placenta.

Answer: H
 The structure that connects the epididymis with the ejaculatory duct is the vas deferens.

Answer: I
 The hormone that stimulates smooth muscle contractions in male and female reproductive tracts is oxytocin.

Answer: J
 The cap over the head of a sperm, which contains lytic enzymes to penetrate egg membranes, is called the acrosome.

Answer: K
 Inner cell mass plus trophoblast, which attaches to the uterine wall, is called the blastocyst.

Answer: A
 The structure that acts to trigger ovulation in females is the surge of luteinizing hormone (LH) from the anterior pituitary gland.

Answer: M
 The structure that is sensitive to sexual stimulation and develops from the same embryonic tissues as does the penis in males is the clitoris.

Answer: N
 The uterine lining is called the endometrium.

Answer: O
 The structure that stimulates maturation of an ovarian follicle is follicle-stimulating hormone (FSH) from the anterior pituitary gland.

Question 15

Choose the one most appropriate answer for each.
-Endometrium
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

The endometrium is the lining of the uterus that thickens during the menstrual cycle to prepare for possible implantation of a fertilized egg.

Answer: K
 The inner cell mass plus trophoblast is the combination of cells that forms the blastocyst, which attaches to the uterine wall during implantation.

Answer: G
 The organ that supplies the mammalian embryo/fetus with nutrients and removes wastes is the placenta.

Answer: O
 The hormone that stimulates maturation of an ovarian follicle is follicle-stimulating hormone (FSH).

Answer: J
 The cap over the head of a sperm that contains lytic enzymes to penetrate egg membranes is the acrosome.

Answer: A
 The process that triggers ovulation in females is the surge of luteinizing hormone (LH) from the anterior pituitary gland.

Answer: L
 The cells that secrete testosterone in the testis are the Leydig cells.

Answer: M
 The clitoris is sensitive to sexual stimulation and develops from the same embryonic tissues as does the penis in males.

Answer: F
 The opening between the uterus and vagina is called the cervix.

Answer: H
 The duct that connects the epididymis with the ejaculatory duct is the vas deferens.

Answer: B
 The structures that secrete fructose-rich fluid used as sperm energy source are the seminal vesicles.

Answer: C
 The structure that forms as an outgrowth of the yolk sac and becomes part of the umbilical cord and urinary bladder is the allantois.

Answer: D
 A drug that causes severely deformed arms and legs in developing embryos is thalidomide.

Question 16

Choose the one most appropriate answer for each.
-Vas deferens
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

The vas deferens connects the epididymis with the ejaculatory duct, serving as a conduit for sperm during ejaculation.

Question 17

Choose the one most appropriate answer for each.
-Epididymis
A)Acts to trigger ovulation in females
B)Structures that secrete fructose-rich fluid used as sperm energy source
C)Forms as an outgrowth of the yolk sac; becomes part of umbilical cord and urinary bladder
D)A drug that causes severely deformed arms and legs in developing embryos
E)Sperm enter this coiled duct on its way to vas deferens
F)Opening between uterus and vagina
G)Organ that supplies the mammalian embryo/fetus with nutrients and removes wastes
H)Connects epididymis with ejaculatory duct
I)Hormone that stimulates smooth muscle contractions in male and female reproductive tracts
J)Cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes
K)Inner cell mass plus trophoblast; attaches to uterine wall
L)Testosterone-secreting cells in the testis
M)Sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males
N)The uterine lining
O)Stimulates maturation of an ovarian follicle

Accepted Answer

The epididymis is a coiled duct located behind each testis, and it is where sperm enter on their way to the vas deferens.

Answer: B
 The structures that secrete fructose-rich fluid used as sperm energy source are called seminal vesicles.

Answer: C
 The structure that forms as an outgrowth of the yolk sac and becomes part of the umbilical cord and urinary bladder is the allantois.

Answer: D
 A drug that causes severely deformed arms and legs in developing embryos is thalidomide.

Answer: H
 The structure that connects the epididymis with the ejaculatory duct is the vas deferens.

Answer: F
 The opening between the uterus and vagina is the cervix.

Answer: G
 The organ that supplies the mammalian embryo/fetus with nutrients and removes wastes is the placenta.

Answer: I
 The hormone that stimulates smooth muscle contractions in the male and female reproductive tracts is oxytocin.

Answer: J
 The cap over the head of a sperm that contains lytic enzymes to penetrate egg membranes is the acrosome.

Answer: K
 The inner cell mass plus trophoblast that attaches to the uterine wall is the blastocyst.

Answer: L
 The testosterone-secreting cells in the testis are called Leydig cells.

Answer: M
 The structure that is sensitive to sexual stimulation and develops from the same embryonic tissues as the penis in males is the clitoris.

Answer: N
 The uterine lining is called the endometrium.

Answer: O
 The hormone that stimulates maturation of an ovarian follicle is follicle-stimulating hormone (FSH).

Question 18

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all.
-This cell is the first sex cell stage to be in the haploid state.
A)Oogonium
B)Primary oocyte
C)Secondary oocyte
D)Polar body
E)Corpus luteum

Accepted Answer

The secondary oocyte is the first sex cell stage to be in the haploid state, following meiosis I, where the chromosome number is halved from the diploid state.

Question 19

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all.
-Haploid cells resulting from meiosis II of a secondary spermatocyte.
A)Spermatogonium
B)Secondary spermatocyte
C)Primary spermatocyte
D)Spermatid
E)Sperm

Accepted Answer

Spermatids are the haploid cells that result from the second meiotic division (meiosis II) of a secondary spermatocyte.

Question 20

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all.
-This cell contains a haploid set of chromosomes but will never be fertilized; often disintegrates and is reabsorbed in the body.
A)Oogonium
B)Primary oocyte
C)Secondary oocyte
D)Polar body
E)Corpus luteum

Accepted Answer

The polar body is a small cell that contains a haploid set of chromosomes but will never be fertilized. It is often disintegrated and reabsorbed in the body.

Answer: B
 The primary oocyte is a diploid cell that undergoes meiosis I to become a secondary oocyte and a polar body.

Answer: C
 The secondary oocyte is an haploid cell that undergoes meiosis II only if fertilized, it is the cell that may eventually become fertilized.

Answer: A
 An oogonium is a diploid (2n) cell that divides via mitosis to produce a primary oocyte.

Answer: E
 The corpus luteum is a structure formed from the follicle after the ovum has been released, it secretes progesterone and maintains the uterine lining. It is not directly involved in the development of the egg.

Quiz 41: Animal Reproductive System

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all. -Human females are born with about 2 million of these cells that entered meiosis but stopped in prophase I.

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all. -The male sex cell is fully formed at this stage of development.

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all. -This is a diploid mitotic product that then undergoes meiosis.

Choose the one most appropriate answer for each. -Placenta

Choose the one most appropriate answer for each. -Seminal vesicles

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all. -This continues to undergo mitosis throughout the reproductive life of the male.

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all. -This cell becomes the mature egg only after fertilization in humans.

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all. -This represents the product of the first meiotic division.

Choose the one most appropriate answer for each. -Oxytocin

Choose the one most appropriate answer for each. -Clitoris

Choose the one most appropriate answer for each. -FSH

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all. -This diploid germ cell produces primary oocytes by mitosis.

Choose the one most appropriate answer for each. -LH

Choose the one most appropriate answer for each. -Leydig cells

Choose the one most appropriate answer for each. -Endometrium

Choose the one most appropriate answer for each. -Vas deferens

Choose the one most appropriate answer for each. -Epididymis

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all. -This cell is the first sex cell stage to be in the haploid state.

Respond to the following statements in reference to the five stages of sperm development listed below. Answers may be used more than once or not at all. -Haploid cells resulting from meiosis II of a secondary spermatocyte.