21) The muscle in the wall of the scrotum the
A) : 1200402.
21) The muscle in the wall of the scrotum is the
A) cremaster muscle.
B) myometrium.
C) dartos muscle.
D) detrusor muscle.
E) external os.
22) The fluids contributed by the seminiferous tubules and epididymis account for about how much of the volume of semen?
A) 75%
B) 5%
C) 50%
D) 10%
E) 25%
23) The waxy material known as smegma is secreted by the ________.
A) bulbo-urethral glands
B) prostate gland
C) seminal glands
D) seminiferous tubules
E) preputial glands
24) The physical maturation of sperm is called ________.
A) meiosis I
B) oogenesis
C) spermatogonia mitosis
D) spermiogenesis
E) tetrad formation
25) Both centrioles of the spermatid are found in the ________.
A) neck
B) head
C) tail
D) middle piece
E) acrosome
26) The secretion of the seminal vesicles contains ________, which forms a temporary semen clot within the vagina after ejaculation.
A) fructose
B) prostaglandin
C) fibrinogen
D) seminalplasmin
E) urine
27) The most important androgen is ________.
A) progesterone
B) GnRH
C) estrogen
D) prostaglandin
E) testosterone
28) The hormone responsible for initiating a male’s sexual maturation and the appearance of secondary sex characteristics is
A) testosterone.
B) ICSH.
C) FSH.
D) LH.
E) gonadotropin.
29) The tubular gland that produces a secretion that contains fructose, is slightly alkaline, and contributes about 60 percent to the volume of the semen is the
A) prostate gland.
B) bulbourethral gland.
C) corpus cavernosum.
D) seminal vesicle.
E) preputial gland.
30) The role of the pituitary hormone LH in males is to
A) stimulate the interstitial cells to produce testosterone.
B) stimulate the sustentacular cells to produce inhibin.
C) initiate sperm production in the testes.
D) develop and maintain secondary sex characteristics.
E) influence sexual behaviors and sex drive.
