Q: A researcher is studying the hormonal regulation of spermatogenesis. Which equation best represents the relationship between GnRH, LH, and testosterone production?

$$\text{GnRH} \rightarrow \text{LH} \rightarrow \text{Testosterone}$$

Question 1

Which of the following best describes the role of the cremaster and dartos muscles in the male reproductive system?

Accepted Answer

They regulate the temperature of the testes by contracting or relaxing.

Question 2

During spermatogenesis, which cell type is responsible for nourishing developing sperm and forming the blood-testis barrier?

Accepted Answer

Sustentacular (Sertoli) cells

Question 3

A patient presents with undescended testes (cryptorchidism). What is the most likely consequence if left untreated?

Accepted Answer

Impaired sperm development due to higher temperature

Question 4

Which accessory gland produces a secretion that helps neutralize the acidic environment of the female vagina just before ejaculation?

Accepted Answer

Bulbourethral gland

Question 5

What is the correct sequence of structures that sperm pass through from their site of production to the urethra?

Accepted Answer

Seminiferous tubules → tubuli recti → rete testis → efferent ductules → epididymis → ductus deferens → ejaculatory duct → urethra

Question 6

Which hormone directly stimulates interstitial (Leydig) cells to produce testosterone during puberty?

Accepted Answer

Luteinizing hormone (LH)

Question 7

Meiosis in the male reproductive system results in the formation of sperm cells with how many chromosomes?

Accepted Answer

$$23$$

Question 8

A male patient has a mutation that prevents the production of fibrinolysin in the prostate gland. What is the most likely effect on semen after ejaculation?

Accepted Answer

Semen remains coagulated and sperm motility is reduced

Question 9

Which structure is responsible for the temporary coagulation of semen immediately after ejaculation?

Accepted Answer

Fibrinogen from seminal vesicles

Question 10

Which of the following is a direct effect of testosterone during male puberty?

Accepted Answer

Hypertrophy of the larynx leading to voice changes

Question 11

A researcher is studying the hormonal regulation of spermatogenesis. Which equation best represents the relationship between GnRH, LH, and testosterone production?

Accepted Answer

$$	ext{GnRH} ightarrow 	ext{LH} ightarrow 	ext{Testosterone}$$

Question 12

Which part of the urethra passes through the muscular floor of the pelvis and is also known as the urogenital diaphragm?

Accepted Answer

Membranous urethra

Question 13

Which anatomical feature divides the perineum into the urogenital and anal triangles?

Accepted Answer

Ischial tuberosity

Question 14

Which of the following is NOT a function of the male reproductive system?

Accepted Answer

Production of oocytes

Question 15

A male patient has a genetic defect in the gubernaculum. Which developmental process is most likely to be affected?

Accepted Answer

Descent of the testes into the scrotum

Question 16

Which of the following best explains why the testes are located outside the body cavity?

Accepted Answer

Sperm development requires a temperature lower than core body temperature

Question 17

Which structure in the male reproductive system is responsible for the majority of sperm maturation?

Accepted Answer

Epididymis

Question 18

Which hormone is primarily responsible for stimulating spermatogenesis in the seminiferous tubules?

Accepted Answer

Follicle-stimulating hormone (FSH)

Question 19

Which of the following is a direct result of the sympathetic nervous system during emission and ejaculation?

Accepted Answer

Constriction of the internal sphincter of the urinary bladder to prevent mixing of semen and urine

Question 20

Which equation best represents the chromosome number change during meiosis in human males?

Accepted Answer

$$2n \rightarrow n$$

Male Reproductive System: Structure, Function, and Physiology (Seeley's Anatomy & Physiology, Ch. 28, Part A)

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