Question 1

Which structure in the male reproductive system is homologous to the labia majora in females, and what is its primary function?

Accepted Answer

Scrotum; to protect and cover some reproductive structures

Question 2

A patient presents with undescended testes at birth. What is the medical term for this condition, and what is a significant risk associated with it?

Accepted Answer

Cryptorchidism; increased risk of testicular cancer

Question 3

Which muscle contracts to draw the testes closer to the body in response to cold temperatures?

Accepted Answer

Cremaster muscle

Question 4

Which gland produces a fluid that accounts for about 60% of semen volume and contains fructose to nourish sperm?

Accepted Answer

Seminal vesicles

Question 5

During spermatogenesis, what is the chromosomal outcome of meiosis II for each primary spermatocyte?

Accepted Answer

Four haploid spermatids, each with 23 chromosomes

Question 6

Which hormone stimulates the interstitial (Leydig) cells of the testes to produce testosterone?

Accepted Answer

Luteinizing hormone (LH)

Question 7

A vasectomy involves cutting and sealing which structure, and what is the physiological result?

Accepted Answer

Ductus (vas) deferens; sperm cannot exit the body

Question 8

Which of the following best describes the function of Sertoli (sustentacular) cells in the seminiferous tubules?

Accepted Answer

Nourish and protect maturing sperm cells and form the blood-testes barrier

Question 9

Which structure is responsible for the majority of sperm maturation and storage?

Accepted Answer

Epididymis

Question 10

Which of the following is a correct sequence for the travel of sperm from the site of production to the outside of the body?

Accepted Answer

Seminiferous tubules → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Penis

Question 11

Which part of the sperm contains enzymes necessary for penetrating the egg during fertilization?

Accepted Answer

Acrosome

Question 12

Which of the following is a secondary male sex characteristic caused by testosterone?

Accepted Answer

Deepening of the voice

Question 13

A male patient is diagnosed with benign prostatic hyperplasia (BPH). Which symptom is most likely due to this condition?

Accepted Answer

Difficulty urinating due to urethral compression

Question 14

Which gland secretes a clear mucus that lubricates the urethra and neutralizes acidic urine prior to ejaculation?

Accepted Answer

Bulbourethral (Cowper's) glands

Question 15

Which of the following best explains why sperm determines the sex of the offspring?

Accepted Answer

Sperm can carry either an X or a Y chromosome, while eggs only carry an X chromosome

Question 16

Which of the following is the correct formula for the reduction in chromosome number during spermatogenesis?

Accepted Answer

$46 \rightarrow 23$

Question 17

Which structure in the male reproductive system is responsible for producing the antibiotic seminalplasmin?

Accepted Answer

Prostate gland

Question 18

Which of the following best describes the function of the pampiniform plexus?

Accepted Answer

Cools arterial blood before it reaches the testes

Question 19

Which portion of the urethra passes through the prostate gland?

Accepted Answer

Prostatic urethra

Question 20

Which of the following best describes the role of FSH (follicle-stimulating hormone) in the male reproductive system?

Accepted Answer

Stimulates sperm production in the seminiferous tubules

Study Guide: The Male Reproductive System

Study Guide - Practice Questions