Question 1

Which statement accurately describes the effects of oxytocin and prostaglandins on uterine contractions?

Accepted Answer

A)   Both oxytocin and prostaglandins stimulate uterine contraction.
B)   Both oxytocin and prostaglandins inhibit uterine contraction.
C)   Oxytocin stimulates uterine contractions, but prostaglandins inhibit them.
D)   Prostaglandins stimulate uterine contractions, but oxytocin inhibits them.E) B) and D)
F) All of the above

Question 2

What is the approximate duration of the fetal period of development?

Accepted Answer

A)   4 weeks
B)   12 weeks
C)   29 weeks
D)   39 weeksE) A) and D)
F) A) and C)

Question 3

The fingerlike structures of the placenta that form from its fetal portion are known as

Accepted Answer

A)   amniotic villi.
B)   chorionic villi.
C)   amniotic stalks.
D)   chorionic stalks.E) A) and D)
F) A) and C)

Question 4

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

Question 5

Postpartum, estrogen and progesterone levels

Accepted Answer

A)   rise steeply.
B)   rise gradually.
C)   fall steeply.
D)   fall gradually.E) A) and D)
F) A) and C)

Question 6

Neurulation is the development of the nervous system from the

Accepted Answer

A)   endoderm.
B)   mesoderm.
C)   ectoderm.
D)   hypoderm.E) A) and D)
F) None of the above

Question 7

The structure of the mesoderm that induces formation of the neural tube is the

Accepted Answer

A)   head mesenchyme.
B)   amnion.
C)   notochord.
D)   paraxial mesoderm.E) B) and C)
F) B) and D)

Question 8

Which pathogen (within the mother)  is most likely to be transmitted across the placenta?

Accepted Answer

A)   A multicellular parasite that is present during the first week of pregnancy
B)   A multicellular parasite that is present during the sixth week of pregnancy
C)   A blood-borne virus that is present during the first week of pregnancy
D)   A blood-borne virus that is present during the sixth week of pregnancyE) A) and C)
F) C) and D)

Question 9

Stretching of the cervix causes oxytocin secretion to

Accepted Answer

A)   increase.
B)   decrease.C) A) and B)
D) undefined

Question 10

The primary germ layer that takes the place of the hypoblast is the

Accepted Answer

A)   mesoderm.
B)   endoderm.
C)   centroderm.
D)   chorion.
E)   trophoblast.F) A) and D)
G) A) and C)

Question 11

When epiblast cells travel through the primitive streak and underneath the epiblast layer, that movement is described as

Accepted Answer

A)   capacitation.
B)   invagination.
C)   chemotaxation.
D)   cleavage.E) None of the above
F) A) and B)

Question 12

The place on a chromosome where a particular gene is located is its

Accepted Answer

A)   locus.
B)   phenotype.
C)   karyotype.
D)   genotype.
E)   linkage.F) C) and E)
G) D) and E)

Question 13

The hormone that signals that fertilization and implantation have taken place is

Accepted Answer

A)   pluripotent prolactin.
B)   human chorionic gonadotropin.
C)   gonadotropin releasing hormone.
D)   progesterone.
E)   pre-embryonic pellucida factor.F) B) and D)
G) A) and E)

Question 14

The trimester during which an embryo becomes a fetus is the ________ trimester.

Accepted Answer

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

Question 15

Approximately when in development does the bilaminar germinal disc begin to form?

Accepted Answer

A)   Day 8
B)   Day 32
C)   Week 8
D)   Week 24E) B) and D)
F) All of the above

Question 16

True labor contractions increase with frequency over time, and pain from such contractions does not change in response to movement.

Accepted Answer

A) True 
 B)False

Question 17

As the fetus develops, the mother's glomerular filtration rate

Accepted Answer

A)   increases by about 10%.
B)   increases by about 40%.
C)   decreases by about 10%.
D)   decreases by about 40%.E) B) and C)
F) A) and C)

Question 18

At the 16-cell stage, the conceptus is known as a(n)

Accepted Answer

A)   trophoblast.
B)   blastocyst.
C)   embryoblast.
D)   morula.
E)   zygote.F) A) and E)
G) A) and D)

Question 19

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) None of the above

Question 20

A trait is said to exhibit ________ dominance when the phenotype of a heterozygous individual is intermediate between the phenotypes of individuals who are homozygous dominant and individuals who are homozygous recessive.

Accepted Answer

The answer of A trait is said to exhibit ________...

Exam 29: Development, Pregnancy, and Heredity

The place on a chromosome where a particular gene is located is its

Correct AnswerverifiedShow Answer

As the fetus develops, the mother's glomerular filtration rate

Correct AnswerverifiedShow Answer

Which statement accurately describes the effects of oxytocin and prostaglandins on uterine contractions?

Correct AnswerverifiedShow Answer

The primary germ layer that takes the place of the hypoblast is the

Correct AnswerverifiedShow Answer

Approximately when in development does the bilaminar germinal disc begin to form?

Correct AnswerverifiedShow Answer

At the 16-cell stage, the conceptus is known as a(n)

Correct AnswerverifiedShow Answer

Stretching of the cervix causes oxytocin secretion to

Correct AnswerverifiedShow Answer

True labor contractions increase with frequency over time, and pain from such contractions does not change in response to movement.

Correct AnswerverifiedShow Answer

The fingerlike structures of the placenta that form from its fetal portion are known as

Correct AnswerverifiedShow Answer

Neurulation is the development of the nervous system from the

Correct AnswerverifiedShow Answer

The trimester during which an embryo becomes a fetus is the ________ trimester.

Correct AnswerverifiedShow Answer

The maternal portion of the placenta arises from the

Correct AnswerverifiedShow Answer

Postpartum, estrogen and progesterone levels

Correct AnswerverifiedShow Answer

When epiblast cells travel through the primitive streak and underneath the epiblast layer, that movement is described as

Correct AnswerverifiedShow Answer

The hormone that signals that fertilization and implantation have taken place is

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

What is the approximate duration of the fetal period of development?

Correct AnswerverifiedShow Answer

A trait is said to exhibit ________ dominance when the phenotype of a heterozygous individual is intermediate between the phenotypes of individuals who are homozygous dominant and individuals who are homozygous recessive.

Correct AnswerverifiedShow Answer

Which pathogen (within the mother) is most likely to be transmitted across the placenta?

Correct AnswerverifiedShow Answer

The structure of the mesoderm that induces formation of the neural tube is the

Correct AnswerverifiedShow Answer

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