Question 1

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) A) and B)
F) All of the above

Question 2

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) All of the above
E) None of the above

Question 3

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) A) and D)
G) None of the above

Question 4

Organogenesis is generally completed by day _____ of development.

Accepted Answer

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

Question 5

The specific location of a gene on a chromosome is its

Accepted Answer

A)   homolog.
B)   genotype.
C)   phenotype.
D)   allele.
E)   locus.F) C) and D)
G) All of the above

Question 6

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) All of the above

Question 7

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) B) and E)
G) B) and D)

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 B)
G) D) and E)

Question 9

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) A) and E)
G) None of the above

Question 10

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 D)
G) A) and B)

Question 11

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 C)
G) A) and D)

Question 12

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 B)
G) A) and C)

Question 13

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) C) and E)
G) None of the above

Question 14

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) A) and B)
G) C) and E)

Question 15

The hormone responsible for milk production is

Accepted Answer

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

Question 16

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) C) and D)

Question 17

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) A) and B)
G) B) and D)

Question 18

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) A) and B)
G) B) and D)

Question 19

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) A) and B)

Question 20

A mistake during segregation of chromosomes is called

Accepted Answer

A)   deletion.
B)   duplication.
C)   nondisjunction.
D)   point mutation.
E)   aneuploidyF) All of the above
G) A) and B)

Exam 29: Development, Growth, Aging, and Genetics

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

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

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Organogenesis is generally completed by day _____ of development.

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A mistake during segregation of chromosomes is called

Correct AnswerverifiedShow Answer

The specific location of a gene on a chromosome is its

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An embryo becomes a fetus about

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

Correct AnswerverifiedShow Answer

The hormone responsible for milk production is

Correct AnswerverifiedShow Answer

Colostrum differs from milk in that it contains

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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One component of brain death is defined as

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Cryptorchidism

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cells of the neuroectoderm become all of the following EXCEPT the

Correct AnswerverifiedShow Answer

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

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

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