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Human Embryology and Developmental Biology 5th Edition - Test Bank
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,Carlson: Human Embryology and Developmental Biology, 5th EditionChapter 01: Getting Ready for Pregnancy
Test Bank
Multiple Choice
1. In a court case, a company was sued because a pregnant woman was exposed to chemical
vapors one day and subsequently gave birth to an infant with a cleft lip/palate. The
embryo was said to have had a menstrual age of 10 weeks at the time of exposure. What
was the fertilization age of the embryo?
A. 6 weeks
B. 8 weeks
C. 10 weeks
D. 12 weeks
E. 14 weeks
ANS: B
2. The first meiotic block in the human female gamete occurs in the ____________.
A. Zygotene stage
B. Diplotene stage
C. Diakinesis stage
D. Metaphase I stage
E. Metaphase II stage
ANS: B
3. As spermatozoa leave the testes and are joined by fluids from the prostate and seminal
vesicles, they become motile because seminal fluid contains an external energy source.
What is that energy source?
A. Glucose
B. Glycogen
C. Ca++
D. Fructose
E. K+
ANS: D
4.
Copyright © 2014 by Saunders, an imprint of Elsevier Inc.
,Test Bank 1-2
5. What is a major function of protamines in spermatogenesis?
A. They prevent autoimmune reactions against the spermatozoa.
B. They are instrumental in the formation of the acrosome.
C. They are associated with the membrane receptors for luteinizing hormone on the
primary spermatocyte.
D. They displace nuclear histones and allow compaction of the nuclear chromatin.
E. They coat the maturing spermatozoa in the epididymis.
ANS: D
6. In a lawsuit, a woman contends that a congenital malformation of her child was due to
her falling down on an icy sidewalk when she was in her eighth week of pregnancy
(menstruation age). How many weeks after fertilization (fertilization age) was the
embryo at the time of the fall?
A. 4 weeks
B. 6 weeks
C. 8 weeks
D. 10 weeks
E. 12 weeks
ANS: B
7. After it leaves a seminiferous tubule of the testes, a spermatozoon that fertilizes an ovum
spends the longest time in the ____________.
A. Epididymis
B. Ductus deferens
C. Seminal vesicle
D. Cervical crypt
E. Uterine tube
ANS: A
8. An alkaline fluid secreted by the ________ helps to raise the pH of the upper vagina after
insemination.
A. Testes
B. Ovaries
C. Prostate
D. Seminal vesicles
E. None of the above
ANS: D
9.
Copyright © 2014 by Saunders, an imprint of Elsevier Inc.
, Test Bank 1-3
10. Two systems—menstrual age and fertilization age—are used in signifying the age of
embryos. To convert from menstrual age to fertilization age:
A. Add 1 week
B. Add 2 weeks
C. Subtract 1 week
D. Subtract 2 weeks
ANS: D
11. A woman is told by her obstetrician that she is already 7 weeks pregnant. What is the
fertilization age of her embryo?
A. 5 weeks
B. 6 weeks
C. 7 weeks
D. 8 weeks
E. 9 weeks
ANS: A
12. Functional maturation of spermatozoa occurs in the _________.
A. Epididymis
B. Ductus deferens
C. Prostate
D. Seminal vesicle
E. Upper vagina
ANS: A
Copyright © 2014 by Saunders, an imprint of Elsevier Inc.
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