Question 1

Figure 26-1 Early Human Development
Use Figure 26-1 to answer the following questions:
-Identify the structures labeled "4."

Accepted Answer

A)   zygotic twins
B)   morula
C)   blastomere
D)   trophoblast
E)   polar bodiesF) A) and B)
G) B) and D)

Question 2

The oval, three-layered sheet produced by gastrulation is called the ________.

Accepted Answer

A)   embryo
B)   ectoderm
C)   inner cell mass
D)   embryonic disc
E)   yolk sacF) B) and C)
G) A) and E)

Question 3

The traits of an individual controlled by his or her genotype are his or her ________.

Accepted Answer

The answer of The traits of an individual controlled by...

Question 4

Stretching of the cervix causes an increase in the blood levels of

Accepted Answer

A)   estrogen.
B)   progesterone.
C)   oxytocin.
D)   relaxin.
E)   chorionic gonadotropin.F) C) and D)
G) None of the above

Question 5

Each of the following statements concerning development is True , except that

Accepted Answer

A)   embryological development includes the events that occur in the first two months.
B)   fetal development occurs from the 9ᵗʰ week until birth.
C)   the first trimester is when the fetus looks distinctively human.
D)   postnatal development begins at birth.
E)   All of the above are True of development.F) None of the above
G) A) and E)

Question 6

Progesterone calms the myometrium and prevents contraction. What factors antagonize progesterone and trigger labor and delivery?

Accepted Answer

A)   rising estrogen levels increase sensitivity
B)   rising oxytocin levels lead to uterine contractions
C)   distortion of the myometrium
D)   distortion of the cervix
E)   all of the aboveF) A) and B)
G) B) and D)

Question 7

All of the following occur during pregnancy, except that

Accepted Answer

A)   a woman's respiratory rate and tidal volume increase.
B)   maternal blood volume increases.
C)   maternal nutrient requirements increase.
D)   a woman's glomerular filtration rate increases.
E)   a woman's bladder capacity increases.F) C) and D)
G) B) and D)

Question 8

The inner cell mass of the blastocyst will

Accepted Answer

A)   form the placenta.
B)   form the morula.
C)   form the embryo.
D)   form blood vessels of the placenta.
E)   provide nutrients for early growth.F) A) and E)
G) A) and B)

Question 9

The almost identical cells produced by cleavage divisions are called ________.

Accepted Answer

The answer of The almost identical cells produced by cleavage...

Question 10

Figure 26-2 Fetus at 10 Weeks
Use Figure 26-2 to answer the following questions:
-Identify the structure labeled "7."

Accepted Answer

A)   amnion
B)   chorion
C)   decidua basalis
D)   placenta
E)   endometriumF) A) and E)
G) B) and E)

Question 11

Which of the following is not part of fertilization?

Accepted Answer

A)   release of acrosomal enzymes
B)   oocyte activation
C)   completion of Meiosis II
D)   amphimixis
E)   completion of Meiosis IF) None of the above
G) A) and C)

Question 12

Figure 26-2 Fetus at 10 Weeks
Use Figure 26-2 to answer the following questions:
-Identify the structure labeled "5."

Accepted Answer

A)   amniotic cavity
B)   chorion
C)   amnion
D)   placenta
E)   endometriumF) B) and E)
G) D) and E)

Question 13

The extraembryonic membrane that forms the fetal portion of the placenta is the

Accepted Answer

A)   yolk sac.
B)   amnion.
C)   allantois.
D)   chorion.
E)   decidua.F) A) and B)
G) All of the above

Question 14

The extraembryonic membrane that forms a fluid-filled sac is the

Accepted Answer

A)   yolk sac.
B)   amnion.
C)   allantois.
D)   all of the above
E)   none of the aboveF) C) and D)
G) B) and D)

Question 15

Genes that appear on the X chromosome are said to be ________.

Accepted Answer

The answer of Genes that appear on the X chromosome...

Question 16

During gastrulation,

Accepted Answer

A)   the blastomeres fuse.
B)   the placenta penetrates the endometrium.
C)   three germ layers are formed.
D)   cells from the hypoblast move to the epiblast.
E)   the neural tube closes.F) A) and C)
G) D) and E)

Question 17

The hormone that increases the flexibility of the pubic symphysis during pregnancy is

Accepted Answer

A)   luteinizing hormone.
B)   progesterone.
C)   human chorionic gonadotropin.
D)   human placental lactogen.
E)   relaxin.F) B) and E)
G) A) and C)

Question 18

The trophoblast has many of the characteristics of ________ cells.

Accepted Answer

A)   cardiac
B)   cancer
C)   infectious
D)   rejuvenating
E)   none of the aboveF) A) and B)
G) C) and D)

Question 19

During gestation, contraction of the myometrium is inhibited by ________, produced by the placenta.

Accepted Answer

A)   progesterone
B)   estrogen
C)   oxytocin
D)   prostaglandins
E)   inhibinF) B) and C)
G) D) and E)

Question 20

A new mother tells you that when she nurses her baby, she feels as if she is having menstrual cramps. How would you explain this phenomenon?

Accepted Answer

During nursing, the mechanical stimulus ...

Exam 26: Development and Inheritance

Genes that appear on the X chromosome are said to be ________.

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A new mother tells you that when she nurses her baby, she feels as if she is having menstrual cramps. How would you explain this phenomenon?

Correct AnswerverifiedDuring nursing, the mechanical stimulus ...View AnswerShow Answer

Figure 26-1 Early Human Development Use Figure 26-1 to answer the following questions: -Identify the structures labeled "4."

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The traits of an individual controlled by his or her genotype are his or her ________.

Correct AnswerverifiedShow Answer

All of the following occur during pregnancy, except that

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The almost identical cells produced by cleavage divisions are called ________.

Correct AnswerverifiedShow Answer

Which of the following is not part of fertilization?

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During gestation, contraction of the myometrium is inhibited by ________, produced by the placenta.

Correct AnswerverifiedShow Answer

Each of the following statements concerning development is True , except that

Correct AnswerverifiedShow Answer

The trophoblast has many of the characteristics of ________ cells.

Correct AnswerverifiedShow Answer

Stretching of the cervix causes an increase in the blood levels of

Correct AnswerverifiedShow Answer

During gastrulation,

Correct AnswerverifiedShow Answer

Progesterone calms the myometrium and prevents contraction. What factors antagonize progesterone and trigger labor and delivery?

Correct AnswerverifiedShow Answer

The inner cell mass of the blastocyst will

Correct AnswerverifiedShow Answer

The hormone that increases the flexibility of the pubic symphysis during pregnancy is

Correct AnswerverifiedShow Answer

The oval, three-layered sheet produced by gastrulation is called the ________.

Correct AnswerverifiedShow Answer

The extraembryonic membrane that forms a fluid-filled sac is the

Correct AnswerverifiedShow Answer

Figure 26-2 Fetus at 10 Weeks Use Figure 26-2 to answer the following questions: -Identify the structure labeled "5."

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Figure 26-2 Fetus at 10 Weeks Use Figure 26-2 to answer the following questions: -Identify the structure labeled "7."

Correct AnswerverifiedShow Answer

The extraembryonic membrane that forms the fetal portion of the placenta is the

Correct AnswerverifiedShow Answer

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During nursing, the mechanical stimulus ...
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