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1
What actually implants into the uterine endometrium?
A)zygote
B)2 cell blastomere
C)4 cell blastomere
D)morula
E)blastocyst
2
The sperm undergo a process of capacitation that
A)requires about 10 hours to complete.
B)requires the removal of cholesterol from the sperm membrane.
C)enables the sperm to penetrate the egg.
D)All of the above.
3
This structure eventually becomes part of the urinary bladder.
A)the placenta
B)the allantois
C)the chorion
D)the yolk sac
4
In human development, all organs systems are present and definable
A)a few days after fertilization.
B)at the morula stage.
C)at the blastocyst stage.
D)at the end of the embryonic stage.
5
Which of the following is not an embryonic membrane?
A)amnion
B)chorion
C)yolk sac
D)umbilicus
6
A genetic anomaly with an XO combination results in ________________.
A)Turner syndrome
B)Klinefelter syndrome
C)Down syndrome
D)triple X syndrome
7
A short person having one palmer crease, a protruding tongue, and mental retardation may have this aneuploidy.
A)XXY
B)XYY
C)trisomy 18
D)trisomy 21
8
Which organ system ages the slowest?
A)respiratory
B)integumentary
C)endocrine
D)nervous
9
The kidneys of a 90 year old will be what percent smaller than those of a 30 year old?
A)10 to 20%
B)20 to 30%
C)20 to 40%
D)80 to 90%
10
Presbyopia begins at about what age?
A)shortly after adolescence
B)20s
C)30s
D)40s





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