Question 1

Which of the following best describes the function of the cremaster muscle in the male reproductive system?

Accepted Answer

It regulates the position of the testes by contracting or relaxing.

Question 2

During spermatogenesis, which cell type is diploid ($$2n) $$and undergoes meiosis I to produce haploid cells?

Accepted Answer

Primary spermatocyte

Question 3

A patient presents with infertility due to a defect in the blood-testis barrier. Which cell type is most directly responsible for forming this barrier?

Accepted Answer

Sustentacular (Sertoli) cells

Question 4

Which accessory gland produces a viscous, alkaline fluid containing fructose, prostaglandins, and clotting proteins?

Accepted Answer

Seminal vesicles

Question 5

If a male has a deficiency in LH secretion, which of the following is most likely to occur?

Accepted Answer

Reduced testosterone production by Leydig cells

Question 6

Which structure is responsible for carrying sperm from the epididymis to the urethra?

Accepted Answer

Ductus (vas) deferens

Question 7

A sperm cell contains 23 chromosomes. Which process ensures this chromosome number?

Accepted Answer

Meiosis

Question 8

Which of the following best explains why the blood-testis barrier is necessary?

Accepted Answer

It prevents an immune response against antigens on newly formed sperm cells.

Question 9

Which hormone is released from the hypothalamus and stimulates the anterior pituitary to secrete LH and FSH?

Accepted Answer

GnRH (Gonadotropin Releasing Hormone)

Question 10

A male patient has a blockage in the ejaculatory duct. Which of the following is most likely to be affected?

Accepted Answer

Mixing of sperm with secretions from the seminal vesicles

Question 11

Which of the following correctly matches the structure with its function?

Accepted Answer

Corpus spongiosum: surrounds the urethra in the penis

Question 12

Which of the following is NOT a function of the male accessory sex glands?

Accepted Answer

Producing sperm

Question 13

If the tunica albuginea is damaged, which of the following is most likely to occur?

Accepted Answer

Impaired division of the testis into lobules

Question 14

Which of the following best describes the process of spermiogenesis?

Accepted Answer

Maturation of spermatids into sperm

Question 15

A sperm cell's midpiece contains numerous mitochondria. What is the primary function of these mitochondria?

Accepted Answer

To provide energy for movement of the sperm tail

Question 16

Which of the following is true regarding the chromosome number in human cells?

Accepted Answer

Somatic cells are diploid ($$2N$$), gametes are haploid ($$N).$$

Question 17

Which of the following structures is covered by the prepuce (foreskin)?

Accepted Answer

Glans penis

Question 18

Which of the following is a correct sequence of events in spermatogenesis?

Accepted Answer

Spermatogonia → primary spermatocyte → meiosis I → secondary spermatocyte → meiosis II → spermatid

Question 19

Which of the following best describes the role of FSH in the male reproductive system?

Accepted Answer

Promotes spermatogenesis in the seminiferous tubules

Question 20

A man produces 300 million sperm per day, but only a small fraction reach the oocyte. Which structure contains enzymes that help sperm penetrate the oocyte?

Accepted Answer

Acrosomal cap

The Male Reproductive System: Structure, Function, and Hormonal Regulation

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