Question 1

The first body cavity is called the

Accepted Answer

A)  coelom.
B)  amniotic cavity.
C)  yolk sac.
D)  somite.
E)  chorion.F) B) and D)
G) A) and E)

Question 2

The heat loss of the neonate is compensated for to some extent by the thermal insulation provided by
brown fat.

Accepted Answer

A) True 
 B)False

Question 3

During birth, an infant is normally stimulated to breathe by

Accepted Answer

A)  CO₂ accumulating in the baby's blood.
B)  an increased O₂ level in the baby's new environment.
C)  prostaglandins.
D)  surfactant.
E)  spanking him/her.F) B) and E)
G) B) and C)

Question 4

The most likely outcome of nondisjunction is the production of a gamete receiving

Accepted Answer

A)  no chromosomes.
B)  46 chromosomes.
C)  44 chromosomes.
D)  23 chromosomes.
E)  22 chromosomes.F) B) and D)
G) A) and E)

Question 5

Infant respiratory distress syndrome (IRDS)  is caused by

Accepted Answer

A)  production of very thick respiratory mucus.
B)  deficiency of pulmonary surfactant.
C)  underdeveloped respiratory epithelium.
D)  pulmonary edema.
E)  overinflated alveoli.F) C) and D)
G) B) and D)

Question 6

Which of the following major events of prenatal development happens first?

Accepted Answer

A)  the eyes are fully open
B)  the body is covered with lanugo
C)  bone calcification begins
D)  the central nervous system begins to form
E)  meconium accumulates in the intestinesF) A) and D)
G) A) and C)

Question 7

Trophoblastic nutrition refers to the nutrition of the conceptus before it implants.

Accepted Answer

A) True 
 B)False

Question 8

Life expectancy has steadily increased in the last century, whereas life span has not.

Accepted Answer

A) True 
 B)False  True

Question 9

The slow block refers to the mechanism that prevents fertilization of another egg when one is already
pregnant.

Accepted Answer

A) True 
 B)False

Question 10

The embryonic stage extends from 16 days through the end of week 8.

Accepted Answer

A) True 
 B)False

Question 11

The embryonic membranes include all of the following except the

Accepted Answer

A)  yolk sac.
B)  placenta.
C)  allantois.
D)  chorion.
E)  amnion.F) B) and D)
G) A) and B) B

Question 12

During implantation, the embryoblast undergoes gastrulation.

Accepted Answer

A) True 
 B)False

Question 13

A teratogen is most likely to cause

Accepted Answer

A)  a deformity of the limbs.
B)  aneuploidy.
C)  trisomy.
D)  nondisjunction.
E)  a mutation.F) None of the above
G) B) and D)

Question 14

The fossa ovalis is a remnant of the of the fetus.

Accepted Answer

A)  ductus arteriosus
B)  ductus venosus
C)  umbilical artery
D)  umbilical vein
E)  foramen ovaleF) A) and D)
G) B) and D) E

Question 15

The completely encloses the embryo and provides a stable environment for it.

Accepted Answer

A)  yolk sac
B)  amnion
C)  chorion
D)  chorionic villus
E)  allantoisF) B) and E)
G) A) and E)

Question 16

Congenital anomalies can result from all of the following except

Accepted Answer

A)  an infectious disease in the mother during pregnancy.
B)  a genetic disorder.
C)  exposure to teratogens during pregnancy.
D)  smoking during lactation.
E)  smoking during pregnancy.F) All of the above
G) A) and E)

Question 17

Urine retention is a greater problem for elderly men than for elderly women because men

Accepted Answer

A)  usually develop benign prostatic hyperplasia.
B)  have larger bladders.
C)  have weaker urinary sphincters.
D)  have narrower ureters.
E)  have fewer glomeruli.F) All of the above
G) B) and C)

Question 18

Senescence begins at different ages and progresses at different rates in different organ systems.

Accepted Answer

A) True 
 B)False

Question 19

As it implants, the conceptus is nourished by means of

Accepted Answer

A)  trophoblastic nutrition.
B)  uterine milk.
C)  nutrient diffusion from the endometrium.
D)  placenta.
E)  umbilical nutrition.F) C) and D)
G) A) and D)

Question 20

Muscular weakness tends to develop in old age for all of the following reasons except

Accepted Answer

A)  aged muscle has less glycogen, myoglobin, and creatine phosphate.
B)  there are fewer motor neurons in the spinal cord.
C)  aged muscle fibers have fewer myofibrils.
D)  there are fewer and smaller mitochondria.
E)  myocytes do not synthesize myosin anymore.F) None of the above
G) A) and C)

Exam 29: Human Development and Aging

The first body cavity is called the

Correct AnswerverifiedShow Answer

The heat loss of the neonate is compensated for to some extent by the thermal insulation provided by brown fat.

Correct AnswerverifiedShow Answer

During birth, an infant is normally stimulated to breathe by

Correct AnswerverifiedShow Answer

The most likely outcome of nondisjunction is the production of a gamete receiving

Correct AnswerverifiedShow Answer

Infant respiratory distress syndrome (IRDS) is caused by

Correct AnswerverifiedShow Answer

Which of the following major events of prenatal development happens first?

Correct AnswerverifiedShow Answer

Trophoblastic nutrition refers to the nutrition of the conceptus before it implants.

Correct AnswerverifiedShow Answer

Life expectancy has steadily increased in the last century, whereas life span has not.

Correct AnswerverifiedTrue

The slow block refers to the mechanism that prevents fertilization of another egg when one is already pregnant.

Correct AnswerverifiedShow Answer

The embryonic stage extends from 16 days through the end of week 8.

Correct AnswerverifiedShow Answer

The embryonic membranes include all of the following except the

Correct AnswerverifiedB

During implantation, the embryoblast undergoes gastrulation.

Correct AnswerverifiedShow Answer

A teratogen is most likely to cause

Correct AnswerverifiedShow Answer

The fossa ovalis is a remnant of the of the fetus.

Correct AnswerverifiedE

The completely encloses the embryo and provides a stable environment for it.

Correct AnswerverifiedShow Answer

Congenital anomalies can result from all of the following except

Correct AnswerverifiedShow Answer

Urine retention is a greater problem for elderly men than for elderly women because men

Correct AnswerverifiedShow Answer

Senescence begins at different ages and progresses at different rates in different organ systems.

Correct AnswerverifiedShow Answer

As it implants, the conceptus is nourished by means of

Correct AnswerverifiedShow Answer

Muscular weakness tends to develop in old age for all of the following reasons except

Correct AnswerverifiedShow Answer

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True

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B

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E

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