Question 1

Corticotropin-releasing hormone (CRH),released by the placenta,increases the production of cortisol from the adrenal cortex,which is needed for the maturation of the fetal lungs and the production of surfactant.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is the inner germ layer?

Accepted Answer

A)  endoderm
B)  ectoderm
C)  epiblast
D)  mesoderm A

Question 3

What makes estrogen and progesterone after the fourth month of pregnancy to maintain the uterine lining?

Accepted Answer

A)  placenta
B)  anterior pituitary
C)  ovaries
D)  corpus luteum A

Question 4

Predict the possible blood types,or phenotypes,of offspring in which the father has blood type O and the mother has blood type AB.

Accepted Answer

A)  The possible blood types of the offspring are phenotypes A,B,AB,or O.
B)  The possible blood types of the offspring are phenotypes A or O only.
C)  The possible blood types of the offspring are phenotypes A or B only.
D)  The possible blood types of the offspring are phenotypes AB or O only.

Question 5

Cephalocaudal folding creates the:

Accepted Answer

A)  head and buttocks regions.
B)  digestive tract.
C)  future trunk region.
D)  primitive gut.

Question 6

During which month of prenatal development will the fetus begin to develop reflexes?

Accepted Answer

A)  month 2
B)  month 4
C)  month 6
D)  month 8

Question 7

What follows immediately after fertilization occurs?

Accepted Answer

A)  cleavage
B)  capacitation
C)  sperm migration
D)  acrosomal reaction

Question 8

Discuss the function of ductus venosus in a fetus.

Accepted Answer

The umbilical vein delivers oxygenated b...

Question 9

When do the extraembryonic membranes form?

Accepted Answer

A)  eighth week of development
B)  fifth week of development
C)  tenth week of development
D)  second week of development

Question 10

Determine when the fetal lungs begin producing surfactant and explain why it is important.

Accepted Answer

The fetal lungs begin producing surfacta...

Question 11

An old saying goes,"For every child,a tooth is lost." This saying suggests that a mother may lose a tooth for each child she births.Predict the hormone responsible for this potential pregnancy issue.

Accepted Answer

Parathyroid hormone,secreted by the para...

Question 12

Which hormone suppresses uterine contractions until birth?

Accepted Answer

A)  melanocyte-stimulating hormone (MSH) 
B)  relaxin
C)  human chorionic gonadotropin (hCG) 
D)  human placental lactogen (hPL)

Question 13

The initial stimulus for labor comes from the:

Accepted Answer

A)  fetus.
B)  maternal uterus.
C)  maternal ovaries.
D)  maternal hypothalamus.

Question 14

Chorionic villus sampling (CVS)may be performed early in pregnancy to find certain problems with the fetus.Determine and describe the extraembryonic membrane that is being sampled.

Accepted Answer

The chorion,an extraembryonic membrane,f...

Question 15

The differentiation of the germ layers into organs and organ systems is known as:

Accepted Answer

A)  embryonic folding.
B)  gastrulation.
C)  ingression.
D)  organogenesis.

Question 16

Mrs.Floyd developed an accentuated lumbar curvature during the last few months of her pregnancy.Determine this spinal curvature.

Accepted Answer

A)  scoliosis
B)  spina bifida
C)  kyphosis
D)  lordosis

Question 17

What do the umbilical arteries transport?

Accepted Answer

A)  oxygenated blood toward the fetal heart
B)  nutrients toward the fetal heart
C)  deoxygenated blood away from the fetal heart
D)  oxygenated blood away from the fetal heart

Question 18

The four extraembryonic membranes that arise from the bilaminar embryonic disc are the endoderm,mesoderm,ectoderm,and placenta.

Accepted Answer

A) True 
 B)False

Question 19

April has an abundance of freckles,a physical expression of her genes known as the:

Accepted Answer

A)  alleles.
B)  phenotype.
C)  homologous.
D)  genotype. B

Question 20

Along which line of the embryo does the primitive streak form?

Accepted Answer

A)  dorsal-ventral
B)  lateral-medial
C)  right-left
D)  cephalic-caudal

Exam 27: Development Heredity

Corticotropin-releasing hormone (CRH),released by the placenta,increases the production of cortisol from the adrenal cortex,which is needed for the maturation of the fetal lungs and the production of surfactant.

Correct AnswerverifiedShow Answer

Which of the following is the inner germ layer?

Correct AnswerverifiedA

What makes estrogen and progesterone after the fourth month of pregnancy to maintain the uterine lining?

Correct AnswerverifiedA

Predict the possible blood types,or phenotypes,of offspring in which the father has blood type O and the mother has blood type AB.

Correct AnswerverifiedShow Answer

Cephalocaudal folding creates the:

Correct AnswerverifiedShow Answer

During which month of prenatal development will the fetus begin to develop reflexes?

Correct AnswerverifiedShow Answer

What follows immediately after fertilization occurs?

Correct AnswerverifiedShow Answer

Discuss the function of ductus venosus in a fetus.

Correct AnswerverifiedThe umbilical vein delivers oxygenated b...View AnswerShow Answer

When do the extraembryonic membranes form?

Correct AnswerverifiedShow Answer

Determine when the fetal lungs begin producing surfactant and explain why it is important.

Correct AnswerverifiedThe fetal lungs begin producing surfacta...View AnswerShow Answer

An old saying goes,"For every child,a tooth is lost." This saying suggests that a mother may lose a tooth for each child she births.Predict the hormone responsible for this potential pregnancy issue.

Correct AnswerverifiedParathyroid hormone,secreted by the para...View AnswerShow Answer

Which hormone suppresses uterine contractions until birth?

Correct AnswerverifiedShow Answer

The initial stimulus for labor comes from the:

Correct AnswerverifiedShow Answer

Chorionic villus sampling (CVS)may be performed early in pregnancy to find certain problems with the fetus.Determine and describe the extraembryonic membrane that is being sampled.

Correct AnswerverifiedThe chorion,an extraembryonic membrane,f...View AnswerShow Answer

The differentiation of the germ layers into organs and organ systems is known as:

Correct AnswerverifiedShow Answer

Mrs.Floyd developed an accentuated lumbar curvature during the last few months of her pregnancy.Determine this spinal curvature.

Correct AnswerverifiedShow Answer

What do the umbilical arteries transport?

Correct AnswerverifiedShow Answer

The four extraembryonic membranes that arise from the bilaminar embryonic disc are the endoderm,mesoderm,ectoderm,and placenta.

Correct AnswerverifiedShow Answer

April has an abundance of freckles,a physical expression of her genes known as the:

Correct AnswerverifiedB

Along which line of the embryo does the primitive streak form?

Correct AnswerverifiedShow Answer

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A

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A

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The umbilical vein delivers oxygenated b...
View Answer

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The fetal lungs begin producing surfacta...
View Answer

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Parathyroid hormone,secreted by the para...
View Answer

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The chorion,an extraembryonic membrane,f...
View Answer

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B

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