Term
A fertilized egg is called a/an
A. autosome.
B. zygote.
C. ovum.
D. Barr body. |
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Definition
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Term
What is the principal sex steroid in males?
A. estrogen
B. testosterone
C. progesterone
D. aldosterone |
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Definition
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Term
How many chromosomes are found in a normal human cell?
A. 23
B. 23 pair
C. 46
D. Both 23 pair and 46 are correct. |
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Definition
| D. Both 23 pair and 46 are correct. |
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Term
A lack of testosterone in males will cause the genital tubercle to form a(n)
A. penis.
B. testis.
C. clitoris.
D. ovary. |
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Definition
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Term
. Males lacking testosterone receptors would
A. develop as genotypic females.
B. have testes and female external genitalia.
C. lack gonads.
D. have male internal genitalia. |
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Definition
| B. have testes and female external genitalia. |
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Term
The embryonic urethral fold becomes the female
A. labia minora.
B. labia majora.
C. glans clitoris.
D. All of these choices are correct. |
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Definition
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Term
In males androgens are required for
A. initiation of spermatogenesis at puberty.
B. regression of the wolffian ducts during embryonic development.
C. maintenance of accessory sex organs.
D. development of the Müllerian ducts. |
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Definition
| C. maintenance of accessory sex organs. |
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Term
Which of the following is a precursor to melatonin synthesis?
A. tryptophan
B. serotonin
C. tyrosine
D. Both tryptophan and serotonin are correct. |
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Definition
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Term
. The correct order of the four phases of sexual response in the male would be
A. excitation, plateau, orgasm, resolution.
B. plateau, excitation, orgasm, resolution.
C. orgasm, excitation, resolution, plateau.
D. resolution, plateau, excitation, orgasm. |
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Definition
| A. excitation, plateau, orgasm, resolution. |
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Term
The majority of the testis is comprised of
A. Leydig cells.
B. interstitial cells.
C. Sertoli cells.
D. seminiferous tubules. |
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Definition
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Term
Sertoli cells are stimulated by ___________, while Leydig cells are stimulated by _________.
A. FSH, LH
B. LH, FSH
C. testosterone, LH
D. FSH, testosterone |
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Definition
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Term
. Secretion of LH is inhibited by
A. high concentrations of inhibin.
B. rapidly rising concentrations of estradiol.
C. high concentrations of testosterone.
D. decreasing concentrations of progesterone. |
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Definition
| C. high concentrations of testosterone. |
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Term
. Male androgens
A. stimulate protein synthesis and muscle growth.
B. stimulate bone growth.
C. stimulate erythropoiesis.
D. All of these choices are correct. |
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Definition
| D. All of these choices are correct. |
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Term
. Spermatogenesis is regulated by
A. FSH.
B. testosterone.
C. growth hormone.
D. progesterone. |
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Definition
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Term
. Nitric oxide released by endothelial cells in vascular smooth muscle is responsible for smooth muscle relaxation and therefore responsible for which of the following?
A. reduced blood flow to bronchioles
B. increased blood flow in placenta
C. increased blood flow to the fetus
D. penile erection |
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Definition
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Term
Which of the following is the essential organ of the female reproductive system?
A. uterus
B. vagina
C. ovaries
D. uterine tubes |
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Definition
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Term
What is it called when a mature follicle ruptures and ejects the oocyte into the uterine tube?
A. gestation
B. menstruation
C. ovulation
D. fertilization |
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Definition
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Term
What is formed following ovulation from the empty follicle due to LH influence?
A. macula lutea
B. corpus luteum
C. fibroids
D. Graafian follicle |
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Definition
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Term
. Luteal regression may be inhibited by
A. inhibiting the synthesis of prostaglandins.
B. stimulating the synthesis of progesterone.
C. stimulating the synthesis of LH.
D. inhibiting the synthesis of FSH. |
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Definition
| A. inhibiting the synthesis of prostaglandins. |
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Term
. In the female menstrual cycle
A. ovulation is stimulated by decreasing concentrations of progesterone.
B. menstruation occurs during the last four days of the cycle.
C. progesterone secretion is stimulated by LH.
D. the luteal phase is characterized by high circulating concentrations of estrogens. |
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Definition
| C. progesterone secretion is stimulated by LH. |
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Term
. For the rhythm method to be successful, coitus (sexual intercourse) must not happen
A. during the first 10 days of the menstrual cycle.
B. 6 days prior to ovulation through 2 days after ovulation.
C. during the last 10 days of the menstrual cycle.
D. Both during the first 10 days of the menstrual cycle and during the last 10 days of the menstrual cycle. |
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Definition
| B. 6 days prior to ovulation through 2 days after ovulation. |
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Term
The weak form of estrogen found in the blood of postmenopausal women is termed
A. estrogen.
B. progesterone.
C. estrone.
D. menopausal estrogen. |
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Definition
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Term
The progressive fusion of the acrosomal membrane with the plasma membrane of the sperm is called the
A. spermatogenesis.
B. acrosomal reaction.
C. spermiogenesis.
D. capacitation. |
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Definition
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Term
. Ova are fertilized in the
A. cervix.
B. fallopian tubes.
C. uterus.
D. vagina. |
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Definition
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Term
. What is the procedure in which some amnionic fluid is aspired in order to obtain sloughed off fetal cells for examination?
A. placentocentesis
B. amniocentesis
C. chorioncentesis
D. uterocentesis |
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Definition
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Term
The chorion frondosum develops from the ___________ layer of the chorion.
A. cytotrophoblast
B. yolk sac
C. syncytiotrophoblast
D. amnion |
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Definition
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