Question 1

Genetically, aging can be affected by genes that regulate

Accepted Answer

A)  glucose and lipid metabolism.
B)  maintenance of the retinas.
C)  gametogenesis.
D)  melanin production.E) All of the above
F) A) and B)

Question 2

The inner cell mass

Accepted Answer

A)  becomes part of the placental membrane.
B)  forms the amnion.
C)  becomes part of the chorion.
D)  gives rise to the embryo.E) B) and C)
F) A) and D) D

Question 3

Which of the following is a function of hCG?

Accepted Answer

A)  It breaks down the corpus luteum.
B)  It helps protect the blastocyst against being rejected.
C)  It prevents the developing placenta from secreting hormones.
D)  It stimulates the release of enzymes that enable the blastocyst to implant into the endometrium.E) All of the above
F) A) and C)

Question 4

The fetal stage of development begins at the end of the eighth week.

Accepted Answer

A) True 
 B)False

Question 5

As a result of the foramen ovale, blood is allowed to bypass the

Accepted Answer

A)  aorta.
B)  liver.
C)  lungs.
D)  kidneys.E) None of the above
F) B) and D)

Question 6

The placenta allows

Accepted Answer

A)  oxygen and nutrients to diffuse from maternal blood to the embryo.
B)  carbon dioxide and other wastes to diffuse from the maternal blood to the embryonic blood.
C)  maternal blood to mix with fetal blood.
D)  the fetus to enlarge without rupturing the mother's abdomen.E) B) and D)
F) B) and C)

Question 7

In the fetal circulation, blood from the ________ flows directly into the descending aorta.

Accepted Answer

A)  foramen ovale
B)  ductus arteriosus
C)  ligamentum arteriosum
D)  ductus venosusE) B) and C)
F) A) and D)

Question 8

The foramen ovale is an opening that allows fetal blood to pass from the

Accepted Answer

A)  right atrium to the left atrium.
B)  left atrium to right atrium.
C)  right ventricle to the left ventricle.
D)  left ventricle to the right ventricle.E) A) and B)
F) A) and C) A

Question 9

Which of the following is NOT true about the fetal stage of development?

Accepted Answer

A)  It begins 8 weeks after fertilization.
B)  The organ systems are mostly formed, although immature.
C)  The head is disproportionately large compared to the rest of the body at the beginning of the stage.
D)  It includes the blastocyst and morula stages.E) None of the above
F) All of the above

Question 10

Which of the following adult structures is not derived from the same primary germ layer as the others?

Accepted Answer

A)  Nerves
B)  Blood vessels
C)  Muscles
D)  BonesE) A) and B)
F) None of the above

Question 11

The placenta is composed of tissues from the

Accepted Answer

A)  mother only.
B)  embryo only.
C)  mother and embryo.
D)  chorion only.E) All of the above
F) A) and D)

Question 12

The major body part(s) derived from ectoderm is/are

Accepted Answer

A)  nervous system and skin.
B)  muscle tissue.
C)  bone tissue.
D)  liver and pancreas.E) A) and B)
F) A) and C)

Question 13

The fetus is protected from certain infections, to which the mother is immune, by

Accepted Answer

A)  antibodies from the mother's immune system.
B)  antibodies from its own immune system.
C)  its own innate defenses.
D)  the extraembryonic membranes.E) A) and B)
F) A) and C)

Question 14

Which of the following is not a characteristic of childhood?

Accepted Answer

A)  Secondary teeth replacing primary teeth
B)  Becoming reproductively functional
C)  Establishing bowel control
D)  Developing a high degree of voluntary muscular controlE) A) and C)
F) A) and B)

Question 15

In a fetus, the umbilical arteries arise from the renal arteries.

Accepted Answer

A) True 
 B)False  False

Question 16

Repair enzymes correct

Accepted Answer

A)  the degeneration of collagen and elastin.
B)  mutations that occur when DNA replicates.
C)  free radical build-up.
D)  lipofuscin build-up.E) A) and B)
F) B) and C)

Question 17

The implantation of the blastocyst results from

Accepted Answer

A)  enzymes digesting the endometrium around the blastocyst.
B)  hyaluronic acid breaking down the myometrium around the blastocyst.
C)  hCG stimulating the growth of trophoblast blood vessels.
D)  the cessation of the reproductive cycle.E) A) and D)
F) B) and C)

Question 18

The external genitalia of the fetus can be distinguished as male or female by about ________ weeks after fertilization.

Accepted Answer

A)  3
B)  6
C)  12
D)  24E) B) and D)
F) None of the above

Question 19

Which of the following layers is considered loosely organized connective tissue?

Accepted Answer

A)  Mesoderm
B)  Endoderm
C)  Ectoderm
D)  EpidermisE) B) and D)
F) None of the above

Question 20

The neonatal period of development extends from birth to the end of one year.

Accepted Answer

A) True 
 B)False

Exam 23: Pregnancy, Growth, and Development

Genetically, aging can be affected by genes that regulate

Correct AnswerverifiedShow Answer

The inner cell mass

Correct AnswerverifiedD

Which of the following is a function of hCG?

Correct AnswerverifiedShow Answer

The fetal stage of development begins at the end of the eighth week.

Correct AnswerverifiedShow Answer

As a result of the foramen ovale, blood is allowed to bypass the

Correct AnswerverifiedShow Answer

The placenta allows

Correct AnswerverifiedShow Answer

In the fetal circulation, blood from the ________ flows directly into the descending aorta.

Correct AnswerverifiedShow Answer

The foramen ovale is an opening that allows fetal blood to pass from the

Correct AnswerverifiedA

Which of the following is NOT true about the fetal stage of development?

Correct AnswerverifiedShow Answer

Which of the following adult structures is not derived from the same primary germ layer as the others?

Correct AnswerverifiedShow Answer

The placenta is composed of tissues from the

Correct AnswerverifiedShow Answer

The major body part(s) derived from ectoderm is/are

Correct AnswerverifiedShow Answer

The fetus is protected from certain infections, to which the mother is immune, by

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of childhood?

Correct AnswerverifiedShow Answer

In a fetus, the umbilical arteries arise from the renal arteries.

Correct AnswerverifiedFalse

Repair enzymes correct

Correct AnswerverifiedShow Answer

The implantation of the blastocyst results from

Correct AnswerverifiedShow Answer

The external genitalia of the fetus can be distinguished as male or female by about ________ weeks after fertilization.

Correct AnswerverifiedShow Answer

Which of the following layers is considered loosely organized connective tissue?

Correct AnswerverifiedShow Answer

The neonatal period of development extends from birth to the end of one year.

Correct AnswerverifiedShow Answer

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A

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False

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