What initiates menstrual flow?
A) the pituitary triggers it.
B) luteinizing hormone activity is at its peak.
C) estrogen activity is at a peak.
D) progesterone production is highest.
E) both progesterone and estrogen decline to low levels.
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Q42: Secondary sexual characteristics in the male are
Q43: Approximately how many mature egg cells are
Q44: The hormone inhibin
A)decreases sexual urges.
B)triggers ovulation in
Q45: Male sexual behavior is promoted by
A)androgen.
B)testosterone.
C)estrogen.
D)ecdysone.
E)progesterone.
Q46: _ is closely associated with maturation of
Q48: The _ is the inner lining of
Q49: Male athletes who consider taking synthetic steroid
Q50: The two major female hormones are
A)androgen and
Q51: Fertilization in humans normally occurs in the
A)uterus.
B)vagina.
C)outer
Q52: Luteinizing hormone stimulates the
A)seminiferous tubules of the
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