Question 1

Germ layers form during the ____ period while organ systems mature during the ____ period.

Accepted Answer

A)   embryonic; fetal
B)   prenatal; neonatal
C)   germinal; embryonic
D)   germinal; fetal
E)   fetal; germinalF) A) and E)
G) A) and D)

Question 2

The embryo is most sensitive to outside influences that can cause malformations during the

Accepted Answer

A)   first two weeks after fertilization.
B)   third to the ninth weeks of development.
C)   ninth to the sixteenth weeks of development.
D)   twelfth to the twentieth weeks of development.
E)   twenty-first to twenty-sixth week of development.F) D) and E)
G) C) and D)

Question 3

The type of fetal monitoring that uses sound waves to visualize the developing fetus is

Accepted Answer

A)   fetoscopy.
B)   ultrasound.
C)   amniocentesis.
D)   chorionic villi sampling.
E)   auscultation.F) None of the above
G) A) and C)

Question 4

A mistake during segregation of chromosomes is called

Accepted Answer

A)   deletion.
B)   duplication.
C)   nondisjunction.
D)   point mutation.
E)   aneuploidyF) C) and D)
G) B) and C)

Question 5

Organogenesis is generally completed by day _____ of development.

Accepted Answer

A)   20
B)   30
C)   45
D)   60
E)   75F) B) and C)
G) A) and E)

Question 6

The hormone responsible for milk production is

Accepted Answer

A)   estrogen.
B)   progesterone.
C)   oxytocin.
D)   prolactin.
E)   FSH.F) A) and E)
G) A) and D)

Question 7

What genetic disorder is the inability to produce normal hemoglobin?

Accepted Answer

A)   albinism
B)   sickle-cell disease
C)   hemophilia
D)   Down syndrome
E)   achondroplasiaF) A) and D)
G) A) and C)

Question 8

An embryo becomes a fetus about

Accepted Answer

A)   14 days after fertilization.
B)   30 days after fertilization.
C)   60 days after fertilization.
D)   3 months after fertilization.
E)   6 months after fertilization.F) A) and E)
G) B) and E)

Question 9

Cells of the neuroectoderm become all of the following EXCEPT the

Accepted Answer

A)   brain
B)   spinal cord
C)   postganglionic autonomic neurons
D)   posterior pituitary glandE) C) and D)
F) A) and C)

Question 10

The most significant complication of infant prematurity is infant respiratory distress syndrome, which occurs because very young premature infants cannot produce ______________.

Accepted Answer

A)   surfactant
B)   blood
C)   oxygen
D)   erythropoietin
E)   growth hormoneF) None of the above
G) A) and C)

Question 11

When the dominant allele does not completely mask the effects of the recessive allele in the heterozygote, it is called

Accepted Answer

A)   dominance.
B)   polygenic dominance.
C)   codominance.
D)   incomplete dominance.
E)   corecessive.F) B) and C)
G) A) and B)

Question 12

In humans, somatic cells have ____ chromosomes, while reproductive cells (gametes)  have ____.

Accepted Answer

A)   23; 46
B)   92; 46
C)   46; 23
D)   46; 69
E)   92; 23F) None of the above
G) C) and D)

Question 13

Colostrum differs from milk in that it contains

Accepted Answer

A)   little fat.
B)   no antibodies.
C)   more protein.
D)   more lactose.
E)   more fat.F) All of the above
G) B) and C)

Question 14

Which of the following organ systems is derived from all three germ layers?

Accepted Answer

A)   nervous
B)   cardiovascular
C)   endocrine
D)   integumentary
E)   skeletalF) B) and E)
G) A) and C)

Question 15

One component of brain death is defined as

Accepted Answer

A)   loss of reflexes.
B)   lack of spontaneous movement.
C)   a flat electroencephalogram (EEG) .D) B) and C)
E) All of the above

Question 16

Cryptorchidism

Accepted Answer

A)   is the failure of the testes to descend into the scrotal sac.
B)   may be due to excessive amounts of testosterone in the fetus.
C)   has no effect on fertility.
D)   results in feminization of the male fetus.
E)   is the lack of testes.F) C) and E)
G) D) and E)

Question 17

The specific location of a gene on a chromosome is its

Accepted Answer

A)   homolog.
B)   genotype.
C)   phenotype.
D)   allele.
E)   locus.F) B) and C)
G) A) and B)

Question 18

Which of the following structures is NOT involved in the formation of the face?

Accepted Answer

A)   apical ectodermal ridges
B)   frontonasal process
C)   maxillary processes
D)   mandibular processesE) None of the above
F) B) and D)

Question 19

Which of the following is mismatched?

Accepted Answer

A)   foramen ovale - ligamentum ovale
B)   ductus arteriosus - ligamentum arteriosus
C)   ductus venosus - ligamentum venosus
D)   umbilical vein - ligamentum teres of the liver
E)   umbilical arteries - cords of umbilical arteriesF) C) and D)
G) B) and C)

Question 20

One reason for the increased incidence of cancer with aging is a decrease in

Accepted Answer

A)   urine output.
B)   cardiac output.
C)   red blood cells.
D)   functioning of T lymphocytes.
E)   functioning neutrophils.F) B) and E)
G) All of the above

Exam 29: Development, Growth, Aging, and Genetics

The type of fetal monitoring that uses sound waves to visualize the developing fetus is

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Colostrum differs from milk in that it contains

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The hormone responsible for milk production is

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An embryo becomes a fetus about

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Cells of the neuroectoderm become all of the following EXCEPT the

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Which of the following is mismatched?

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What genetic disorder is the inability to produce normal hemoglobin?

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The specific location of a gene on a chromosome is its

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Germ layers form during the ____ period while organ systems mature during the ____ period.

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Cryptorchidism

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In humans, somatic cells have ____ chromosomes, while reproductive cells (gametes) have ____.

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Which of the following organ systems is derived from all three germ layers?

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Organogenesis is generally completed by day _____ of development.

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The most significant complication of infant prematurity is infant respiratory distress syndrome, which occurs because very young premature infants cannot produce ______________.

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A mistake during segregation of chromosomes is called

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One reason for the increased incidence of cancer with aging is a decrease in

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When the dominant allele does not completely mask the effects of the recessive allele in the heterozygote, it is called

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Which of the following structures is NOT involved in the formation of the face?

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The embryo is most sensitive to outside influences that can cause malformations during the

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One component of brain death is defined as

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Germ layers form during the period while organ systems mature during the period.

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In humans, somatic cells have chromosomes, while reproductive cells (gametes) have .

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