Question 1

The tightly coiled tube that receives and stores sperm from one testis is a(an):

Accepted Answer

The tightly coiled tube that receives and stores sperm from one testis is the epididymis. The scrotum is the external sac that holds the testes. The vas deferens is the tube that carries sperm from the epididymis to the urethra. The bulbourethral gland and seminal vesicle are accessory glands that contribute to semen production.

Question 2

In the male,the tube that extends the length of the penis and carries semen out of the body is the:

Accepted Answer

E

Question 3

The structure that secretes a thin,milky,alkaline fluid that activates the sperm to swim is the:

Accepted Answer

The prostate gland secretes a thin, milky, alkaline fluid that helps activate sperm motility and provides a suitable environment for sperm to swim.

Question 4

The end of the uterus that opens to the vagina is the:

Accepted Answer

The cervix is the part of the uterus that protrudes into the vagina and opens to allow flow of menstrual blood and to facilitate childbirth. The other options listed refer to external parts of the female genitalia.

Question 5

Cilia sweep the released mature oocytes from ovaries into the:

Accepted Answer

Cilia sweep the released mature oocytes from ovaries into the uterine tubes, also known as fallopian tubes or oviducts. The uterine tubes are where fertilization typically occurs, and the fertilized egg will then travel to the uterus for implantation.

Question 6

The muscular sac-like organ of the human female in which the fetus develops is the:

Accepted Answer

The uterus is the reproductive organ in which the fetus develops during pregnancy. The ovaries produce the eggs that are fertilized in the fallopian tubes and then implanted in the uterus. The vagina and vulva are external genitalia. The pubic symphysis is a joint between the two pubic bones.

Question 7

In the male,the sac-like structure that contains the testes is the:

Accepted Answer

The scrotum is a sac-like structure that contains the testes in males. It is located outside the body and helps to regulate the temperature of the testes for optimal spermatogenesis. The epididymis and vas deferens are part of the male reproductive system but do not contain the testes themselves. Sustentacular cells and seminal vesicles are also components of the male reproductive system but are not related to the storage of testes.

Question 8

The cells in the ovary that give rise to the mature egg cells are the:

Accepted Answer

Oocytes are the cells in the ovary that develop into mature egg cells through the process of oogenesis.

Question 9

The diploid first cell of a new organism is a:

Accepted Answer

The diploid first cell of a new organism is a zygote, which results from the fusion of two haploid gametes (sperm and egg) during fertilization. A morula is a stage in embryonic development where the zygote undergoes several rounds of cell division and forms a solid mass of cells. A polar body is a small cell that is produced during oogenesis and does not participate in fertilization. An oogonium is a diploid cell in the ovary that undergoes mitosis and gives rise to primary oocytes.

Question 10

Which of the following is not found on a sperm cell?

Accepted Answer

Sperm cells have flagella for motility, a nucleus containing genetic material, an acrosome containing enzymes for fertilization, and mitochondria for energy production. However, cilia are not found on sperm cells. Cilia are short, hair-like projections found on the surface of certain cells that help with movement and filtering.

Question 11

In the human male and female reproductive systems,each system contains paired primary sex organs called _______________,which contain ___________ that give rise to gametes.

Accepted Answer

Both male and female reproductive systems contain paired primary sex organs called gonads (testes in males and ovaries in females) that contain germ cells which give rise to gametes. Option A is correct for males specifically, and option C is correct for females specifically, but option B is more general and encompasses both sexes. Option D is incorrect as the bulbo-urethral glands do not contain germ cells.

Question 12

The cap-like __________________ covers the head of the sperm and releases enzymes that will help the sperm penetrate the egg.

Accepted Answer

The cap-like structure that covers the head of the sperm and releases enzymes to help penetrate the egg is the acrosome.

Question 13

The inch-long structure in the human female that stimulates the female to experience orgasm is the:

Accepted Answer

The clitoris is an erectile structure located above the vaginal opening and is the primary source of female sexual pleasure. Stimulation of the clitoris during sexual activity can result in female orgasm. The other structures listed do not play a direct role in female orgasm.

Question 14

The process that unites the male gametes with the female gametes in organisms that reproduce sexually is termed:

Accepted Answer

Fertilization is the process of fusion of male and female gametes, which forms a zygote. This process is responsible for sexual reproduction. Conjugation is a form of genetic exchange in unicellular organisms, crossing over is a process that occurs during meiosis, Gastrulation refers to the formation of the gastrula from a blastula during embryonic development, and recombination is a process that occurs during DNA replication. None of these processes involves the fusion of male and female gametes to form a zygote, making the best choice for this question B, fertilization.

Question 15

Mature human sperm cells:

Accepted Answer

Mature human sperm cells are spermatozoa, and they are the final product of spermatogenesis. They are haploid cells containing 23 chromosomes in each of their nuclei. Spermatozoa are produced in the seminiferous tubules of the testes through the process of spermatogenesis. Spermatogenesis involves the differentiation of spermatogonia into primary spermatocytes, which undergo meiosis I to form secondary spermatocytes. These then undergo meiosis II to form haploid spermatids, which mature into spermatozoa.

Question 16

The structure that secretes most of the fluid found in the semen and opens into the vas deferens is the:

Accepted Answer

The seminal vesicle secretes most of the fluid found in semen and opens into the ejaculatory duct, which then joins the urethra. The other options do not secrete fluid found in semen or open into the vas deferens.

Question 17

The tightly coiled structure (structures)inside the testes that produce the sperm cells is (are)the:

Accepted Answer

The seminiferous tubules are tightly coiled structures located inside the testes and are responsible for the production of sperm cells. The epididymis is a structure located on top of the testes that function to store and mature sperm cells. The vas deferens is a tube that transports sperm from the epididymis to the urethra. Interstitial cells are located in the spaces between the seminiferous tubules and produce testosterone. The bulbourethral glands produce a clear, viscous fluid that lubricates the urethra during ejaculation.

Question 18

Human spermatogonia:

Accepted Answer

Spermatogonia are germ cells that reside within the seminiferous tubules. They are diploid cells, meaning they have two sets of chromosomes.

Question 19

In organisms that reproduce sexually,________ are the sex cells that carry the genetic information from each parent.

Accepted Answer

Haploid gametes are the sex cells that carry the genetic information from each parent. Diploid zygotes are formed when two haploid gametes fuse during fertilization. Haploid zygotes do not exist as they would have only half the necessary genetic information for an organism. Diploid gametes also do not exist as they would have double the necessary genetic information for an organism. Diploid morulas are not related to the question as they are an early stage of development in embryonic development.

Question 20

In human males,the different types of male sex hormones are collectively called:

Accepted Answer

In human males, the different types of male sex hormones are collectively called androgens. Androgens are responsible for the development of male primary and secondary sexual characteristics. Examples of androgens include testosterone and dihydrotestosterone.

Quiz 34: Animal Reproduction and Development

The tightly coiled tube that receives and stores sperm from one testis is a(an) :