27.1 Sexual Reproduction and Development

1			A cord that connects the scrotum to the gonad and guides the testes into the scrotum during development is called the
			A)	testicular arteries.
			B)	sperm duct.
			C)	vas deferens.
			D)	gubernaculums.
2			When the testis fails to descend, the condition is called _________.
			A)	hypospadias
			B)	prostitis
			C)	cryptorchidism
			D)	smegma
3			Male and female organs that develop from the same embryonic tissue are called
			A)	heterozygous.
			B)	homozygous.
			C)	homologous.
			D)	abnormalities of sexual development.
4			Sperm are produced in the
			A)	seminiferous tubules.
			B)	interstitial cells.
			C)	sertoli cells.
			D)	sustentacular cells.

27.2 Male Reproductive Anatomy

5			To regulate the temperature of the testes, which of the following muscles raises and lowers the scrotum?
			A)	cremaster muscle
			B)	dartos muscle
			C)	pampiniform plexus of muscles
			D)	perineal raphe muscle
6			The erectile tissue in the penis contains blood sinuses called
			A)	lacunae.
			B)	trabeculae.
			C)	smegma.
			D)	crus.
7			60% of semen consists of
			A)	sperm cells.
			B)	secretions of the bulbourethral glands.
			C)	secretions of the prostate gland.
			D)	secretions of the seminal vesicles.
8			The blood to the testes is cooled by the ________________.
			A)	rete testes
			B)	ductus deferens
			C)	pampinform plexus
			D)	perineal raphe

27.3 Puberty and Climacteric

9			The sustentacular cells of the testes secrete ______ in response to FSH stimulation.
			A)	androgen-binding protein
			B)	serine protease
			C)	proseminogelin
			D)	seminogelin
			E)	prostate-specific antigen
10			Which of the following is a hypothalamic hormone which stimulates certain anterior pituitary cells to produce gonadotropins?
			A)	GH
			B)	testosterone
			C)	DHT
			D)	GnRH
11			LH stimulates the interstitial cells to produce ______.
			A)	seminogelin
			B)	estrogen
			C)	androgens
			D)	progesterone

27.4 Sperm and Semen

12			A lysosome which forms a cap over the apical portion of the nucleus of sperm is a(n)
			A)	midpiece.
			B)	acrosome.
			C)	nucleus.
			D)	principal piece.
			E)	axoneme
13			After the meiosis I phase of spermatogenesis, there are two equal-sized haploid cells called
			A)	spermatogonia.
			B)	primary spermatocytes.
			C)	secondary spermatocytes.
			D)	spermatids.
14			An enlargement of this organ will impair both sexual reproduction and voiding in the man.
			A)	bulbourethral gland
			B)	seminal vesicles
			C)	seminiferous tubules
			D)	ampulla
			E)	prostate
15			The midpiece of the spermatozoon tail contains the ________________.
			A)	mitochondria
			B)	nucleus
			C)	acrosome
			D)	basal body
			E)	principal piece
16			Spermatogenesis produces
			A)	haploid sperm from haploid spermatogonia.
			B)	diploid sperm from diploid spermatogonia.
			C)	haploid sperm from diploid spermatogonia.
			D)	diploid sperm from haploid spermatogonia.
17			This part of the sperm contains enzymes that are used to penetrate the egg.
			A)	midpiece
			B)	acrosome
			C)	nucleus
			D)	axoneme
18			Crossing over of DNA segments occurs during ________________.
			A)	mitosis I
			B)	anaphase I
			C)	meiosis I
			D)	prophase I

27.5 Male Sexual Response

19			Emission of the sperm involves which of the following?
			A)	spasmodic contractions of the bulbospongiosus
			B)	contraction of the trabecular muscles
			C)	detumescent penis
			D)	internal pudendal artery constricts
			E)	peristalsis of the ductus deferens and prostate
20			The parasympathetic reflex which stimulates erection is mediated via the
			A)	hypogastric plexus.
			B)	pudendal nerves.
			C)	pelvic nerve.
			D)	somatic motor plexus.
			E)	obturator nerve.