Question 1

What occurs during stage 3 of labor?

Accepted Answer

A)  The cervix dilates. 
B)  The baby is born. 
C)  Effacement occurs. 
D)  The amniotic sac ruptures. 
E)  The placenta is expelled. 
A)  The cervix dilates. 
B)  The baby is born. 
C)  Effacement occurs. 
D)  The amniotic sac ruptures. 
E)  The placenta is expelled. E

Question 2

The nervous system is to the ectoderm as the skeleton is to the

Accepted Answer

A)  mesoderm. 
B)  endoderm. 
C)  chorion. 
D)  allantois. 
E)  blastula. 
A)  mesoderm. 
B)  endoderm. 
C)  chorion. 
D)  allantois. 
E)  blastula. A

Question 3

The yolk sac of the chick provides nutrients to the developing embryo.What structure serves the same role in humans?

Accepted Answer

A)  chorion 
B)  allantois 
C)  yolk sac 
D)  amnion 
E)  zona pellucida 
A)  chorion 
B)  allantois 
C)  yolk sac 
D)  amnion 
E)  zona pellucida A

Question 4

Which of the following statements is related to a decrease in blood flow?

Accepted Answer

A)  Males become infertile. 
B)  Females undergo menopause. 
C)  Ventilation of the lungs is reduced. 
D)  The liver does not metabolize drugs as efficiently as before. 
E)  The homeostatic adjustment to heat is limited. 
A)  Males become infertile. 
B)  Females undergo menopause. 
C)  Ventilation of the lungs is reduced. 
D)  The liver does not metabolize drugs as efficiently as before. 
E)  The homeostatic adjustment to heat is limited.

Question 5

Describe the steps of fertilizing an egg cell.

Accepted Answer

1.Sperm makes its way through the corona

Question 6

Which of the following is involved in the prevention of polyspermy?

Accepted Answer

A)  acrosome of the sperm 
B)  depolarization of the egg's plasma membrane 
C)  fusion of the sperm and egg nucleus 
D)  changes within the corona radiata 
E)  the number of chromosomes contained within the sperm 
A)  acrosome of the sperm 
B)  depolarization of the egg's plasma membrane 
C)  fusion of the sperm and egg nucleus 
D)  changes within the corona radiata 
E)  the number of chromosomes contained within the sperm

Question 7

Which of these is associated with pre-embryonic development?

Accepted Answer

A)  morula 
B)  embryonic disk 
C)  gastrulation 
D)  primary germ layers 
E)  formation of the umbilical cord 
A)  morula 
B)  embryonic disk 
C)  gastrulation 
D)  primary germ layers 
E)  formation of the umbilical cord

Question 8

When cells take on specific structure and function,this is called

Accepted Answer

A)  cleavage. 
B)  growth. 
C)  morphogenesis. 
D)  differentiation. 
E)  fertilization. 
A)  cleavage. 
B)  growth. 
C)  morphogenesis. 
D)  differentiation. 
E)  fertilization.

Question 9

Summarize the events that occur during each stage of birth.

Accepted Answer

Stage 1 is when the uterine contractions

Question 10

Sheila is experiencing contractions every 15 to 20 minutes that last for 40 seconds or longer.Is she in labor?

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is not true concerning the fetus during the third month of development?

Accepted Answer

A)  Bone begins to be replaced with cartilage in certain areas of the skeleton. 
B)  The nose, eyes, and ears are present. 
C)  Fingernails, nipples, eyelashes, eyebrows, and hair on the head appear. 
D)  Head growth slows down as the rest of the body increases in length. 
E)  It is possible to distinguish males from females. 
A)  Bone begins to be replaced with cartilage in certain areas of the skeleton. 
B)  The nose, eyes, and ears are present. 
C)  Fingernails, nipples, eyelashes, eyebrows, and hair on the head appear. 
D)  Head growth slows down as the rest of the body increases in length. 
E)  It is possible to distinguish males from females.

Question 12

An embryo at the 4-cell stage of development is almost twice the size of an embryo at the 2-cell stage of development.

Accepted Answer

A) True 
 B)False

Question 13

The names of the extraembryonic membranes are derived from their function in animals that produce shelled eggs.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following skin changes is not associated with growing older?

Accepted Answer

A)  Pigmented blotches appear on the skin. 
B)  There is less adipose tissue in the subcutaneous layer. 
C)  The number of elastic fibers decreases. 
D)  There is an increase in the number of oil glands. 
E)  There are fewer sweat glands for sweating to occur. 
A)  Pigmented blotches appear on the skin. 
B)  There is less adipose tissue in the subcutaneous layer. 
C)  The number of elastic fibers decreases. 
D)  There is an increase in the number of oil glands. 
E)  There are fewer sweat glands for sweating to occur.

Question 15

The number of neural cells in the cerebral cortex decreases during the aging process.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not involved in the increase in blood volume in a pregnant woman?

Accepted Answer

A)  progesterone 
B)  artery expansion 
C)  renin-angiotensin-aldosterone mechanism 
D)  an increase in blood oxygen levels 
E)  sodium and water retention 
A)  progesterone 
B)  artery expansion 
C)  renin-angiotensin-aldosterone mechanism 
D)  an increase in blood oxygen levels 
E)  sodium and water retention

Question 17

Which of the following occurs during the embryonic stage of development?

Accepted Answer

A)  Chorion appears. 
B)  Nose, eyes, and ears become noticeable. 
C)  Testes descend into the scrotum. 
D)  Heartbeat can be heard. 
E)  Fingernails appear. 
A)  Chorion appears. 
B)  Nose, eyes, and ears become noticeable. 
C)  Testes descend into the scrotum. 
D)  Heartbeat can be heard. 
E)  Fingernails appear.

Question 18

How do males and females differ as they age?

Accepted Answer

A)  Females undergo menopause, but males do not undergo any changes in their reproductive hormone levels. 
B)  Males can continue to produce sperm until death, but females do not continue to produce eggs. 
C)  Males develop urinary incontinence, but females do not. 
D)  Males lose skeletal muscle mass, but females tend to gain muscle mass. 
E)  Females dehydrate faster than males do. 
A)  Females undergo menopause, but males do not undergo any changes in their reproductive hormone levels. 
B)  Males can continue to produce sperm until death, but females do not continue to produce eggs. 
C)  Males develop urinary incontinence, but females do not. 
D)  Males lose skeletal muscle mass, but females tend to gain muscle mass. 
E)  Females dehydrate faster than males do.

Question 19

What structure produces progesterone and estrogen during pregnancy?

Accepted Answer

A)  placenta 
B)  hypothalamus 
C)  anterior pituitary 
D)  posterior pituitary 
E)  ovaries 
A)  placenta 
B)  hypothalamus 
C)  anterior pituitary 
D)  posterior pituitary 
E)  ovaries

Question 20

The first system in the body to become visibly differentiated during development is the

Accepted Answer

A)  digestive system. 
B)  cardiovascular system. 
C)  respiratory system. 
D)  nervous system. 
E)  reproductive system. 
A)  digestive system. 
B)  cardiovascular system. 
C)  respiratory system. 
D)  nervous system. 
E)  reproductive system.

Exam 18: Development and Aging

What occurs during stage 3 of labor?

The nervous system is to the ectoderm as the skeleton is to the

The yolk sac of the chick provides nutrients to the developing embryo.What structure serves the same role in humans?

Which of the following statements is related to a decrease in blood flow?

Describe the steps of fertilizing an egg cell.

Which of the following is involved in the prevention of polyspermy?

Which of these is associated with pre-embryonic development?

When cells take on specific structure and function,this is called

Summarize the events that occur during each stage of birth.

Sheila is experiencing contractions every 15 to 20 minutes that last for 40 seconds or longer.Is she in labor?

Which of the following is not true concerning the fetus during the third month of development?

An embryo at the 4-cell stage of development is almost twice the size of an embryo at the 2-cell stage of development.

The names of the extraembryonic membranes are derived from their function in animals that produce shelled eggs.

Which of the following skin changes is not associated with growing older?

The number of neural cells in the cerebral cortex decreases during the aging process.

Which of the following is not involved in the increase in blood volume in a pregnant woman?

Which of the following occurs during the embryonic stage of development?

How do males and females differ as they age?

What structure produces progesterone and estrogen during pregnancy?

The first system in the body to become visibly differentiated during development is the

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