Anatomy Chapter 25 Reproductive System

49) The female uterine cycle begins

B) on the first day of menstruation.

59) Which of the following organs does not contribute secretion(s) during the male sexual response?

D) corpus cavernosum

57) The most common site of ectopic pregnancy is the

D) uterine tube.

79) The embryonic urethral folds develop into the female

C) labia minora.

47) Which of the following anchors the uterus into an anteverted position in the pelvis?

C) round ligament

76) All of the following are functions of the sustentocytes in the seminiferous tubules except

C) secretion of testosterone.

82) In which part of the uterine tube does fertilization usually occur?

A) ampulla

17) The fluid-filled cavity in a mature ovarian follicle is known as

B) antrum.

38) The seminal vesicles

B) are glands that secrete most of the volume of the semen.

77) The typical (diploid) cells of the body have 46 chromosomes; how many chromosomes does each gamete have?

A) 23

35) At what point during fetal development is the decidua basalis/chorionic villi collectively referred to as the placenta?

C) the start of fourth month

72) The structural basis of the blood-testis barrier is

C) the tight junctions between sustentocytes.

43) Hypospadias

A) never occurs in females.

53) The prepuce of the clitoris is formed by

C) the labia minora.

23) This multinucleate embryonic structure invades the uterus, digesting cells and maternal blood vessels to make way for development of the placenta.

A) syncytiotrophoblast

26) The usual site of embryo implantation is the

A) uterus.

42) Inguinal hernias

B) always enter the inguinal canal.

51) The largest macroscopic region of the uterus is its

B) body.

69) The placenta consists of which two structures?

B) chorionic villi and decidua basalis

71) Which structure is not derived from the embryonic paramesonephric ducts?

B) clitoris

28) Sperm become motile in the

B) epididymis.

45) By undergoing meiosis, each primary spermatocyte ultimately gives rise to how many sperm cells?

B) four

34) The function of the pampiniform plexus of veins is to

B) help cool blood.

52) The zona pellucida

B) is a protective shell around the oocyte that sperm must penetrate for fertilization to occur.

31) The female homologue of the male scrotum is the

B) labia majora.

74) An episiotomy during childbirth is performed to

B) minimize tearing of the central tendon and muscles of the pelvic floor.

40) Which testicular cells help deliver sperm to the epididymis by contracting rhythmically?

B) myoid

22) Tubules that connect testicular lobules with the efferent ductules of the epididymis.

B) rete testis

27) A factor that propels an oocyte through the uterine tube is

B) smooth muscle contraction (peristalsis).

56) The epithelium lining the vagina is

B) stratified squamous.

84) The vaginal fornix

B) surrounds the tip of the cervix.

29) Which of the following is the primary sex organ in the male?

B) the testis

50) In addition to remaining granulosa cells, which of the following cell types make up the corpus luteum?

B) theca cells

33) In cows, the nipples (teats) are in the groin region, not in the midthorax as in humans. What is the most logical reason for this difference between cows and people?

D) Cows' mammary glands arise from a different part of the milk line.

75) Which of the following statements about pelvic inflammatory disease is incorrect?

D) It inhibits ovulation.

58) Which of the following events occurs when the testes do not descend before birth?

D) Viable sperm will not be produced.

44) The function of the cremaster muscle is to

D) alter the position of the testes in the scrotal sac with increases in ambient temperature.

20) Fertilization of the ovum normally occurs in this region of the oviduct.

D) ampulla

25) Fingerlike placental structures where oxygen and nutrients from the maternal blood supply diffuse into the embryonic blood.

D) chorionic villi

41) In the early fetus, all of the following are parts of the chorionic villi except the

D) decidua.

87) In males, the paramesonephric (Müllerian) ducts

D) degenerate and don't form any structures in males.

32) A woman's sex cells (germ cells) originate embryologically

D) from yolk sac endoderm.

24) Type of cell in the testes that produces testosterone.

D) interstitial

65) A hydrocele

D) is excess serous fluid in the scrotum.

83) Most support of the uterus is provided by the

D) muscles of the pelvic floor.

18) This layer of the uterus contracts during parturition to expel the baby.

D) myometrium

30) The correct sequence of sperm-transporting tubules that transport spermatozoa to the epididymis is the

D) seminiferous tubule to straight tubule to rete testis to efferent ductule.

36) A woman has developed a cancerous lump in each breast, and the skin of the breasts is dimpled. What structure(s) is (are) causing the dimpling?

D) suspensory ligaments of the breast

37) All of the following are adaptations for keeping the testes cool except the

D) testicular artery.

63) Sperm are moved into the epididymis from the testis by

D) testicular fluid moved by cilia and smooth muscle cells.

66) A difference between a primary follicle and a primordial follicle is that

D) the primordial follicle has only a single layer of flat follicular cells, whereas the primary follicle is comprised of cuboidal follicle cells.

55) In females, the paramesonephric ducts give rise to

D) the uterine tubes and uterus.

46) Of the following tubes, which is the only one that lies partly outside the testis?

D) efferent ductule

85) In an adult woman who has never been pregnant, the breasts have poorly developed or no

A) lobules of acini/alveoli.

78) All of the following are located within the spermatic cord except the

A) superficial inguinal ring.

68) Which structure develops into the umbilical cord?

A) body stalk

70) Which of the following pairs of structures is not derived from the same embryonic tissues?

A) ductus deferens, uterine tube

48) The ovarian cortex consists of

A) follicles and connective tissue.

86) The capillaries within a chorionic villus of the placenta contain blood

A) from the fetus.

67) The acrosomal reaction occurs

A) just before fertilization.

39) In breast cancer, the cancer cells usually originate from the

A) lactiferous ductules.

61) Which female structure is homologous to the corpus spongiosum of the penis?

C) bulb of the vestibule

81) Technically, the theca folliculi is not part of the ovarian follicle, although it is associated with it. Instead, the theca folliculi arises from the

C) connective tissue that fills the area between follicles.

21) Involuntary contraction of this smooth muscle layer wrinkles and thickens the walls of the scrotum to prevent heat loss.

C) dartos muscle

16) Tubular organ that is transected during a vasectomy.

C) ductus deferens

62) Erection is caused by

C) erectile bodies filling with blood.

64) The deep inguinal ring is formed by

C) fascia layer deep to the transversus abdominis muscle.

19) The opening of the oviduct is surrounded by these structures.

C) fimbriae

80) The cells that secrete estrogens in females are

C) granulosa cells.

54) The milk-producing cells in the breast are

C) simple cuboidal epithelial cells in alveoli.

60) During the proliferative phase of the uterine cycle, these vessels grow and proliferate.

C) spiral arteries

73) In the late stages of pregnancy, the placental barrier of the chorionic villi consists only of which two layers?

C) syncytiotrophoblast and capillary endothelium