UNIT 7- REPRODUCTION Flashcards
For questions 1–4, match the item with the correct selection:
1. Menstrual phase
2. Follicular phase
3. Luteal phase
4. Ovulation
a. High estrogen and progesterone; low FSH and LH
b. Low estrogen and progesterone
c. LH surge
d. Increasing estrogen; low LH and low progesterone
- b
- d
- a
- c
A person with the genotype XO has
a. ovaries.
b. testes.
c. both ovaries and testes.
d. neither ovaries nor testes.
a
An embryo with the genotype XX develops female accessory sex organs because of
a. Androgens
b. Estrogens
c. Lack of androgens
d. Lack of estrogens
c
In the male,
a. FSH is not secreted by the pituitary.
b. FSH receptors are located in the interstitial endocrine cells.
c. FSH receptors are located in the spermatogonia.
d. FSH receptors are located in the Sertoli cells.
d
The secretion of FSH in a male is inhibited by negative
feedback effects of
a. inhibin secreted from the tubules.
b. inhibin secreted from the interstitial endocrine cells.
c. testosterone secreted from the tubules.
d. testosterone secreted from the interstitial endocrine cells.
a
Which of these statements is true?
a. Sperm are not motile until they pass through the epididymis.
b. Sperm require capacitation in the female reproductive tract before they can fertilize an ovum.
c. A secondary oocyte does not complete meiotic division until it has been fertilized.
d. All of these are true.
d
The corpus luteum is maintained for the first 10 weeks of pregnancy by
a. hCG
b. LH
c. estrogen
d. progesterone
a
Fertilization normally occurs in
a. the ovaries.
b. the uterine tubes.
c. the uterus.
d. the vagina.
b
The placenta is formed from
a. the fetal chorion frondosum.
b. the maternal decidua basalis.
c. both a and b.
d. neither a nor b.
c
Uterine contractions are stimulated by
a. oxytocin.
b. prostaglandins.
c. prolactin.
d. both a and b
e. both b and c
d
Contraction of the mammary glands and ducts during the milk-ejection reflex is stimulated by
a. prolactin.
b. oxytocin.
c. estrogen.
d. progesterone.
b
If GnRH were secreted in large amounts and at a constant rate rather than in a pulsatile fashion, which of these statements would be true?
a. LH secretion will increase at first and then decrease.
b. LH secretion will increase indefinitely.
c. Testosterone secretion in a male will be continuously high.
d. Estradiol secretion in a woman will be continuously high
a
The contents of the birth control pill
a. inhibit secretion of gonadotropins.
b. exert negative feedback on the hypothalamus.
c. prevent ovulation.
d. maintain the endometrium.
e. All of these.
e
Which of the following statements regarding spermatogenesis is false?
a. Testosterone stimulates spermatogenesis.
b. The chromatin becomes highly compacted as protamines
replace histone proteins.
c. Sertoli cells engulf spermatid cytoplasm by phagocytosis.
d. FSH is required for spermatogenesis to occur
d
Which of the following statements about progesterone is false?
a. Progesterone is secreted by the corpus luteum.
b. Progesterone is secreted by the placenta.
c. Progesterone decreases the basal body temperature.
d. Progesterone secretion drops toward the end of the nonfertile luteal phase.
c
