Deck 8: Reproduction and Development

Question 1

Pregnancy begins with

A)implantation.
B)blastocyst formation.
C)gastrulation.
D)conception.
E)formation of the amnion.

Answer 1

A

Question 2

All of the following are parts of the sperm except

A)mitochondria.
B)a nucleus.
C)a flagellum.
D)a diploid set of chromosomes.
E)an acrosome.

Answer 2

D

Question 3

Luteinizing hormone (LH)and follicle-stimulating hormone (FSH)are

A)constantly secreted into the bloodstream of males.
B)produced in both male and female humans.
C)produced in the ovaries.
D)produced in the testes.
E)only produced in female humans.

Answer 3

B

Question 4

This structure serves to block more than one sperm from entering the fertilized egg.

A)acrosome
B)yolk
C)amnion
D)fertilization membrane
E)mitochondria

Question 5

Animals that possess both male and female sexual organs

A)are parthenogenetic and typically self-fertilize.
B)are hermaphroditic and typically self-fertilize.
C)are dioecious and typically cross-fertilize.
D)are dioecious and typically self-fertilize.
E)are hermaphroditic and typically cross-fertilize.

Question 6

The average human ejaculation contains

A)120,000 to 400,000 sperm.
B)1,200,000 to 4,000,000 sperm.
C)12 million to 40 million sperm.
D)120 million to 400 million sperm.
E)1.2 billion to 4 billion sperm.

Question 7

After being produced in the seminiferous tubules, sperm mature in the

A)epididymis.
B)vas deferens.
C)ejaculatory duct.
D)seminal vesicle.
E)urethra.

Question 8

Fertilization usually occurs in the

A)uterus.
B)corpus luteum.
C)ovary.
D)vagina.
E)fallopian tubes.

Question 9

Embryonic development includes all of the following except

A)cleavage.
B)fertilization.
C)gastrulation.
D)organogenesis.
E)growth.

Question 10

Negative feedback loops act to

A)control sperm production.
B)cause uterine contractions during childbirth.
C)cause milk production after childbirth.
D)cause expulsion of milk during breastfeeding.
E)cause an erection of the penis when stimulated.

Question 11

Immature eggs are called

A)oocytes.
B)blastocysts.
C)follicles.
D)basal cells.
E)ovaries.

Question 12

Sperm-producing cells are referred to as

A)spermatocytes.
B)Sertoli cells.
C)interstitial cells.
D)seminiferous cells.
E)spermatogenic cells.

Question 13

External fertilization is most commonly seen

A)in land animals.
B)in plants.
C)in aquatic animals.
D)during dry seasons.
E)among all animals.

Question 14

The interstitial cells of the seminiferous tubules

A)will divide to become sperm cells.
B)are present to nourish the sperm.
C)produce testosterone.
D)produce cholesterol.
E)produce estrogen.

Question 15

Which of the following chemicals plays a part in a man's erection?

A)carbon dioxide
B)carbon monoxide
C)nitric oxide
D)phosphoric acid
E)carbonic acid

Question 16

Human chorionic gonadotropin (hCG)

A)is produced by the amnion.
B)can be used to reveal pregnancy.
C)is stored in the ovaries.
D)acts as a hormone signaling menstruation.
E)is needed to form the placenta.

Question 17

Chemical compounds secreted by mammals and insects to communicate sexual readiness are called

A)pheromones.
B)developers.
C)hormones.
D)testosterones.
E)estrogens.

Question 18

As opposed to external fertilization, internal fertilization ensures that

A)sperm and egg will be released simultaneously.
B)only the fittest of sperm and egg combinations will survive.
C)sperm will be protected until they can unite with the eggs.
D)all of the sperm will fertilize eggs.
E)the number of sperm and eggs produced will be equal.

Question 19

In most male mammals, the testes are present

A)within the abdomen.
B)close to the body to maintain body temperature.
C)from puberty on.
D)in the scrotum.
E)for part of their lives.

Question 20

The primary male hormone is

A)produced throughout a male's entire lifetime.
B)testosterone.
C)estrogen.
D)only involved in sperm production.
E)produced in the brain.

Question 21

Describe the events occurring during gastrulation. What is the destination of the cells in the three layers?

Question 24

Describe the process of ovulation.

Question 25

Describe the primary membranes surrounding the human fetus.

Question 26

This is a structure at the head of a sperm cell that allows it to penetrate an egg cell.

A)acrosome
B)labia
C)centriole
D)cortical granule
E)somite

Question 27

Which of the following statements about the egg cell is false?

A)It is relatively small compared to other body cells.
B)It contains a haploid nucleus.
C)It contains lipids.
D)It contains mitochondria.
E)It is located in a follicle.

Question 29

Match the following structures with their functions.
10. __ seminiferous tubules
11. __ prostate gland
12. __ epididymis
13. __ seminal vesicles
14. ___vasdeferens
A. a single structure, contributes to the semen
B. paired organs that contribute to the semen
C. site of sperm formation
D. tube leading from the epididymis
E. site of sperm maturation

Question 30

What is a negative feedback loop? How does this apply to sperm production?

Question 31

Match the following structures with their functions.
10. ___ovaries
11. ___oviducts
12. ___ corpus luteum
13. ___ uterus
14. ____ vagina
A. Where sperm typically fertilize eggs
B. to receive sperm
C. where embryo implants
D. to produce eggs
E. to produce progesterone

Question 32

Question 33

Describe the pathway of sperm during ejaculation, from production to exiting the body. Include the contributions of various accessory ducts and glands.

Question 35

The male reproductive system contains all of the following structures except the

A)seminal vesicles.
B)prostate gland.
C)clitoris.
D)seminal vesicles.
E)epididymis.

Question 36

Which of the following statements is true of the blastula?

A)It is the earliest stage of embryonic development.
B)Three cell layers are evident.
C)The neural tube forms.
D)Limb buds may be seen.
E)It is haploid.

Question 37

Put the major stages of development in order.

Question 38

Name the male accessory sexual glands and characterize the organs and their secretions.

Question 40

The female reproductive system contains all of the following structures except the

A)cervix.
B)Bartholin's gland.
C)clitoris.
D)acrosome.
E)labia.