Question 1

Teratogens are most damaging to organ systems if exposure to them occurs

Accepted Answer

A)  early in pre-embryonic development.
B)  when the organ systems are undergoing peak development in the embryo.
C)  in the fetal period,after systems have formed but have not completed maturation.D) A) and C)
E) All of the above

Question 2

After delivering a child,the levels of CRH in the mother's blood

Accepted Answer

A)  increase.
B)  decrease.
C)  remain the same.D) B) and C)
E) All of the above

Question 3

Which type of gamete remains viable for a longer time after it enters the female reproductive tract

Accepted Answer

A)  Sperm
B)  EggC) A) and B)
D) undefined

Question 4

Late in pregnancy,levels of estrogen and oxytocin rise.

Accepted Answer

A) True 
 B)False

Question 5

The outermost extraembryonic membrane that eventually helps form the placenta is the

Accepted Answer

A)  amnion.
B)  chorion.
C)  yolk sac.
D)  hypoblast.E) A) and B)
F) A) and C)

Question 6

Drugs that lead to birth defects in the formation of the limbs are most damaging when the conceptus is exposed to them during weeks

Accepted Answer

A)  1-2 of development,before the placenta is fully formed.
B)  4-8 of development,when limbs are undergoing peak development.
C)  12-16 of development,when limbs have formed but are not fully mature.
D)  24-28 of development,when plasticity of surrounding tissues has been lost.E) A) and B)
F) A) and C)

Question 7

The maternal portion of the placenta arises from the

Accepted Answer

A)  amnion.
B)  ectoderm.
C)  functional layer of the uterus.
D)  germinal disc.
E)  myometrium.F) C) and D)
G) A) and E)

Question 8

Sperm undergo a process of conditioning known as __________ after they arrive in the female reproductive tract.

Accepted Answer

The answer of Sperm undergo a process of conditioning known...

Question 9

Increases in weight of the conceptus are largest during the _________ two months of pregnancy.

Accepted Answer

A)  first
B)  middle
C)  lastD) A) and C)
E) All of the above

Question 10

What is expelled during the expulsion stage of labor

Accepted Answer

A)  Colostrum
B)  The fetus
C)  The placenta and remaining fetal membranes
D)  Only amniotic fluidE) C) and D)
F) A) and B)

Question 11

The trophoblast is located at the

Accepted Answer

A)  periphery of the blastocyst.
B)  center of the blastocyst.
C)  periphery of the morula.
D)  center of the morula.
E)  center of the embryoblast.F) A) and E)
G) A) and D)

Question 12

The process that involves the fusion of the two sides of the embryonic disc at a newly formed midline,thereby creating a cylindrical embryo is __________ folding.

Accepted Answer

A)  invagination
B)  cephalocaudal
C)  transverse
D)  amphiamniotic
E)  coronalF) None of the above
G) A) and E)

Question 13

Blood cells and antibodies pass freely across the placenta.

Accepted Answer

A) True 
 B)False

Question 14

Explain the feedback mechanism involved in true labor.Indicate the components of the feedback system (for example,identify the control center),their responses to stimuli,and the nature of the response (is it positive or negative feedback
).

Accepted Answer

Labor involves a positive feedback cycle...

Question 15

Although pregnancies are highly variable,morning sickness is most commonly experienced in the ________ trimester.

Accepted Answer

A)  first
B)  second
C)  thirdD) All of the above
E) A) and B)

Question 16

Someone with the genotype associated with hereditary pancreatitis might not show symptoms of the disorder because the disorder does not have a _________ level of 100%.

Accepted Answer

A)  dominance
B)  penetrance
C)  polygenicity
D)  homozygous
E)  sex-linkageF) C) and D)
G) B) and C)

Question 17

Although pregnancy sometimes results in frequent urination,the one trimester when this tends to be not as problematic is the

Accepted Answer

A)  first.
B)  second.
C)  third.D) B) and C)
E) A) and C)

Question 18

Fertilization typically occurs in the _________,and it restores the _________ number of chromosomes.

Accepted Answer

A)  ampulla of the uterine tube;haploid
B)  ampulla of the uterine tube;diploid
C)  body of the uterus;polyploid
D)  isthmus of the uterine tube;haploid
E)  isthmus of the uterine tube;polyploidF) A) and C)
G) A) and E)

Question 19

Cephalocaudal folding occurs because of the rapid growth of the

Accepted Answer

A)  amnion and embryonic disc.
B)  yolk sac.C) A) and B)
D) undefined

Question 20

The process of organogenesis begins in the fetal period.

Accepted Answer

A) True 
 B)False

Exam 29: Development,Pregnancy,and Heredity

After delivering a child,the levels of CRH in the mother's blood

Correct AnswerverifiedShow Answer

Late in pregnancy,levels of estrogen and oxytocin rise.

Correct AnswerverifiedShow Answer

The trophoblast is located at the

Correct AnswerverifiedShow Answer

What is expelled during the expulsion stage of labor

Correct AnswerverifiedShow Answer

Sperm undergo a process of conditioning known as __________ after they arrive in the female reproductive tract.

Correct AnswerverifiedShow Answer

The maternal portion of the placenta arises from the

Correct AnswerverifiedShow Answer

Teratogens are most damaging to organ systems if exposure to them occurs

Correct AnswerverifiedShow Answer

The process of organogenesis begins in the fetal period.

Correct AnswerverifiedShow Answer

Someone with the genotype associated with hereditary pancreatitis might not show symptoms of the disorder because the disorder does not have a _________ level of 100%.

Correct AnswerverifiedShow Answer

Increases in weight of the conceptus are largest during the _________ two months of pregnancy.

Correct AnswerverifiedShow Answer

Drugs that lead to birth defects in the formation of the limbs are most damaging when the conceptus is exposed to them during weeks

Correct AnswerverifiedShow Answer

The process that involves the fusion of the two sides of the embryonic disc at a newly formed midline,thereby creating a cylindrical embryo is __________ folding.

Correct AnswerverifiedShow Answer

Although pregnancy sometimes results in frequent urination,the one trimester when this tends to be not as problematic is the

Correct AnswerverifiedShow Answer

Which type of gamete remains viable for a longer time after it enters the female reproductive tract

Correct AnswerverifiedShow Answer

Explain the feedback mechanism involved in true labor.Indicate the components of the feedback system (for example,identify the control center),their responses to stimuli,and the nature of the response (is it positive or negative feedback ).

Correct AnswerverifiedLabor involves a positive feedback cycle...View AnswerShow Answer

Although pregnancies are highly variable,morning sickness is most commonly experienced in the ________ trimester.

Correct AnswerverifiedShow Answer

Fertilization typically occurs in the _________,and it restores the _________ number of chromosomes.

Correct AnswerverifiedShow Answer

The outermost extraembryonic membrane that eventually helps form the placenta is the

Correct AnswerverifiedShow Answer

Blood cells and antibodies pass freely across the placenta.

Correct AnswerverifiedShow Answer

Cephalocaudal folding occurs because of the rapid growth of the

Correct AnswerverifiedShow Answer

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Labor involves a positive feedback cycle...
View Answer

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Fertilization typically occurs in the _,and it restores the _ number of chromosomes.

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