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Multiple Choice Quiz
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1
A _____ is a fluid-filled sphere that floats freely in the uterus until the sixth day after fertilization.
A)chorion
B)blastocyst
C)placenta
D)embryonic disk
2
How many fertilized eggs complete the task of implantation?
A)85 – 95%
B)60 – 70%
C)30 – 40%
D)10 – 20%
3
The _____ protein must be secreted for implantation to be successful.
A)L-selectin
B)Hoxa10
C)trophoblast
D)SRY
4
The embryonic stage of prenatal development occurs approximately:
A)during the first two weeks of pregnancy.
B)between weeks 2 and 8 of pregnancy.
C)between weeks 8 and 12 of pregnancy.
D)from week 12 of pregnancy until birth.
5
Which of the following is FALSE when comparing males and females?
A)Males are more likely than females to be spontaneously aborted.
B)More males than females die early in life.
C)Females are conceived less frequently than males.
D)Females are more likely than males to be stillborn.
6
In the United States, what has been identified as the most common cause of mental retardation and the leading preventable cause of birth defects?
A)prenatal exposure to illegal drugs
B)prenatal exposure to the rubella virus
C)prenatal exposure to pesticides
D)prenatal exposure to alcohol
7
Which stage of prenatal development begins with the appearance of bone cells?
A)fetal stage
B)germinal stage
C)fertilization stage
D)embryonic stage
8
Which of the following statements about fetuses is FALSE?
A)Fetuses remember the patterns of sound.
B)Fetuses grow 20 times in length during the fetal stage.
C)Female fetuses are more active than male fetuses.
D)Fetuses experience a significant jump in development between 28 and 32 weeks.
9
Which of the following only recently has been found to be of critical importance in a pregnant woman's diet?
A)folic acid
B)zinc
C)aspirin
D)folate
10
Which of the following is not used to determine whether an unborn baby is developing normally?
A)sonoembriology
B)ultrasound
C)amniocentesis
D)embryoscopy





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