Developing sperm cells are protected by a blood-testis barrier formed by
A. connective tissue septa.
B. interstitial spaces.
C. Leydig cells.
D. sustentacular cells.
E. leukocytes.
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Question 2) Which is not true about spermatogenesis?
A. The process includes two meiotic divisions.
B. The final stage of the process is called spermiogenesis.
C. Mature spermatozoa are haploid (n=23).
D. Spermatogenesis begins at birth and continues throughout a man's life.
E. The process takes place in the walls of the seminiferous tubules.
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Question 3) The stages that appear during spermatogenesis are
a: spermatid
b: primary spermatocyte
c: spermatogonium
d: spermatozoon
e: secondary spermatocyte
What is the correct order of appearance of these stages?
A. b, e, c, d, a
B. c, e, d, a, b
C. c, b, e, a, d
D. a, c, b, e, d
E. d, b, c, e, a
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Question 4) What part of a spermatozoon contains the nuclear material?
A. Acrosome cap
B. Head
C. Midpiece
D. Flagellum
E. Tail
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Question 5) The acrosome cap contains
A. testosterone.
B. nutrients to sustain the sperm.
C. enzymes to allow penetration into the oocyte.
D. mitochondria to provide energy for movement.
E. buffers to neutralize the acidity of the female reproductive tract.
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Question 6) The interstitial cells in the testes
A. undergo mitosis to produce primary spermatocytes.
B. support and protect the developing sperm cells.
C. secrete testosterone.
D. convert fructose to glucose to nourish the sperm.
E. form the lining of the seminiferous tubules.
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Question 7) Which of the following is a thin layer of smooth muscle just beneath the skin of the scrotum?
A. Raphe
B. Cremaster
C. Tunica vaginalis
D. Dartos muscle
E. Inguinal muscle
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Question 8) The ridge that is visible externally along the midline of the scrotum is called the
A. septum.
B. raphe.
C. perineum.
D. tunica albuginea.
E. scrotal cord.
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Question 9) The function of the dartos and cremaster muscles is to
A. attach the penis to the body wall.
B. produce erections.
C. regulate the temperature of the testes.
D. help the testes descend into the scrotum prior to birth.
E. move sperm along the ductus deferens.
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Question 10) Which structure is derived from the peritoneum of the abdominal cavity?
A. Tunica vaginalis
B. Perineal raphe
C. Spermatic cord
D. Tunica albuginea
E. Mediastinum testis
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