Glencoe Biology

Section 3: Birth, Growth, and Aging

Self-Check Quizzes

1
In which stage of birth does the cervix open?
A)expulsion
B)dialation
C)placental
D)fetal
2
What causes the amniotic sac to tear during labor?
A)division of the blastocyst
B)opening of the cervix
C)expulsion of the baby
D)uterine contractions
3
In the ____ stage of birth, the placenta leaves the mother's body.
A)placental
B)expulsion
C)dialation
D)fetal
4
What must occur before the expulsion stage of birth shown here?

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A)a cesarean procedure
B)detachment of the placenta
C)dialation of the cervix
D)cutting of the umbilical cord
5
How is thyroxine significant in adolescence?
A)It prevents human growth hormone from being produced.
B)It decreases metabolic rate and slows growth.
C)It increases metabolic rate and stimulates growth.
D)It slows development of tissues.
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