Question 1

The digital rays of a fetus give rise to __________.

Accepted Answer

A)  arms and legs
B)  ribs and intercostal muscles
C)  fingers and toes
D)  extensor digitorum muscles
E)  radial muscles of the irisF) A) and B)
G) A) and D)

Question 2

The optimal "window of opportunity" to conceive a child is __________.

Accepted Answer

A)  a few days before ovulation to less than a day after
B)  less than a day before ovulation to less than a day after
C)  a few days before ovulation to a few days after
D)  a few days before ovulation
E)  a few days after ovulationF) A) and C)
G) B) and D)

Question 3

Which of the following organ systems shows the greatest anatomical change in the transitional period after birth?

Accepted Answer

A)  Muscular system
B)  Integumentary system
C)  Skeletal system
D)  Circulatory system
E)  Nervous systemF) A) and C)
G) A) and B)

Question 4

Which of the following is not considered an embryonic membrane?

Accepted Answer

A)  Yolk sac
B)  Placenta
C)  Allantois
D)  Chorion
E)  AmnionF) A) and B)
G) A) and C)

Question 5

Inadequate liver function is the most common reason that premature infants suffer from multiple dysfunctions.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A)  can develop benign prostatic hyperplasia
B)  have larger bladders
C)  have weaker urinary sphincters
D)  have narrower ureters
E)  have fewer glomeruliF) D) and E)
G) A) and D)

Question 7

The process that makes it possible for sperm to penetrate the egg is called __________.

Accepted Answer

A)  sperm migration
B)  capacitation
C)  the cortical reaction
D)  morulation
E)  cleavageF) A) and D)
G) A) and B)

Question 8

During implantation,the trophoblast divides into a deep layer called the _________,which is composed of individual cells.

Accepted Answer

A)  chorion
B)  amnion
C)  syncytiotrophoblast
D)  cytotrophoblast
E)  embryoblastF) B) and C)
G) All of the above

Question 9

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 alveoliF) A) and B)
G) A) and C)

Question 10

Oxygenated blood reaches the fetus through the __________.

Accepted Answer

A)  umbilical vein
B)  umbilical arteries
C)  maternal vein
D)  maternal arteries
E)  placental sinusF) None of the above
G) A) and B)

Question 11

In fetal circulation,blood bypasses the lungs by flowing through the __________.

Accepted Answer

A)  umbilical vein and umbilical arteries
B)  fossa ovalis and umbilical arteries and vein
C)  foramen ovale and ductus arteriosus
D)  ductus venosus and ductus arteriosus
E)  ligamentum venosum and ligamentum arteriosumF) B) and D)
G) D) and E)

Question 12

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 13

The first 6 weeks of postpartum life constitute the __________ period.

Accepted Answer

A)  transitional
B)  premature
C)  neonatal
D)  senescence
E)  infancyF) D) and E)
G) C) and D)

Question 14

The observation that there is a limit to how many times a cell can divide is the basis for the __________ theory of senescence.

Accepted Answer

A)  autoimmune
B)  free radical
C)  cross-linking
D)  replicative
E)  abortiveF) D) and E)
G) A) and C)

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

Which of the following organ systems faces the greatest physiological challenge in the transitional period after birth?

Accepted Answer

A)  Muscular system
B)  Integumentary system
C)  Respiratory system
D)  Circulatory system
E)  Nervous systemF) A) and B)
G) All of the above

Question 17

Only autosomal trisomies involving chromosomes 13,18,and 21 are survivable.Why would this be?

Accepted Answer

A)  These are relatively short chromosomes.
B)  These are relatively long chromosomes.
C)  These are relatively gene-poor chromosomes.
D)  These are redundant chromosomes.
E)  These chromosomes have no genes.F) B) and D)
G) A) and D)

Question 18

Older people may require lower drug doses than younger people because __________.

Accepted Answer

A)  their organs are more sensitive to drugs
B)  they have lower rates of renal clearance
C)  they do not absorb as much drug from the small intestine
D)  there is less tissue mass to treat
E)  a lifetime of mutations results in unpredictable drug reactionsF) All of the above
G) A) and B)

Question 19

During implantation,the embryoblast undergoes gastrulation.

Accepted Answer

A) True 
 B)False

Question 20

Teratogens usually do not cause congenital anomalies.

Accepted Answer

A) True 
 B)False

Exam 29: Human Development and Aging

During implantation,the trophoblast divides into a deep layer called the _________,which is composed of individual cells.

Correct AnswerverifiedShow Answer

Older people may require lower drug doses than younger people because __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Inadequate liver function is the most common reason that premature infants suffer from multiple dysfunctions.

Correct AnswerverifiedShow Answer

Which of the following organ systems faces the greatest physiological challenge in the transitional period after birth?

Correct AnswerverifiedShow Answer

Only autosomal trisomies involving chromosomes 13,18,and 21 are survivable.Why would this be?

Correct AnswerverifiedShow Answer

Which of the following organ systems shows the greatest anatomical change in the transitional period after birth?

Correct AnswerverifiedShow Answer

In fetal circulation,blood bypasses the lungs by flowing through the __________.

Correct AnswerverifiedShow Answer

The optimal "window of opportunity" to conceive a child is __________.

Correct AnswerverifiedShow Answer

The digital rays of a fetus give rise to __________.

Correct AnswerverifiedShow Answer

Oxygenated blood reaches the fetus through the __________.

Correct AnswerverifiedShow Answer

The first 6 weeks of postpartum life constitute the __________ period.

Correct AnswerverifiedShow Answer

Infant respiratory distress syndrome (IRDS) is caused by __________.

Correct AnswerverifiedShow Answer

Teratogens usually do not cause congenital anomalies.

Correct AnswerverifiedShow Answer

During implantation,the embryoblast undergoes gastrulation.

Correct AnswerverifiedShow Answer

The process that makes it possible for sperm to penetrate the egg is called __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not considered an embryonic membrane?

Correct AnswerverifiedShow Answer

The observation that there is a limit to how many times a cell can divide is the basis for the __________ theory of senescence.

Correct AnswerverifiedShow Answer

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