Question 1

Which of the following best describes the primary function of the seminiferous tubules in the male reproductive system?

Accepted Answer

Production and maturation of sperm cells

Question 2

The group of male sex hormones is collectively known as androgens. Which hormone is the primary androgen responsible for the development of male secondary sex characteristics?

Accepted Answer

Testosterone

Question 3

A patient presents with undescended testicles at birth. What is the medical term for this condition, and what is a potential consequence if left untreated?

Accepted Answer

Cryptorchidism; increased risk of infertility and testicular cancer

Question 4

Which of the following accurately describes the pathway of sperm from the testes to the external urethral orifice?

Accepted Answer

Seminiferous tubules → rete testis → epididymis → vas deferens → ejaculatory duct → prostatic urethra → membranous urethra → spongy urethra → external urethral orifice

Question 5

Which arteries supply blood to the testicles, and what is the significance of the pampiniform plexus in this region?

Accepted Answer

Testicular arteries; pampiniform plexus cools arterial blood before it enters the testes

Question 6

A vasectomy is a surgical procedure performed for male sterilization. Which structure is cut during this procedure, and what is the immediate effect on sperm conduction?

Accepted Answer

Vas deferens; sperm can no longer travel from the epididymis to the urethra

Question 7

Which neurotransmitter is released by the parasympathetic nervous system to induce an erection, and what is its mechanism of action?

Accepted Answer

Nitric oxide ($$NO$$); causes vasodilation of penile arteries

Question 8

Which of the following is NOT a function of the bulbourethral glands?

Accepted Answer

Production of a fructose-rich fluid to nourish sperm

Question 9

A man is diagnosed with erectile dysfunction. Which of the following is a plausible physiological cause?

Accepted Answer

Impaired release of nitric oxide ($$NO) $$from parasympathetic nerves

Question 10

Which of the following best describes the hormonal regulation of spermatogenesis in the male reproductive system?

Accepted Answer

Gonadotropin-releasing hormone ($$GnRH) $$from the hypothalamus stimulates release of luteinizing hormone ($$LH) $$and follicle-stimulating hormone ($$FSH) $$from the anterior pituitary; $$LH$$ stimulates interstitial endocrine cells to produce testosterone, while $$FSH$$ acts on sustentocytes to promote spermatogenesis.

Question 11

Which of the following is a secondary male sex characteristic?

Accepted Answer

Increased facial and body hair growth

Question 12

During ejaculation, which division of the autonomic nervous system is primarily responsible for the process?

Accepted Answer

Sympathetic

Question 13

Which of the following best describes the function of the corpus cavernosa in the penis?

Accepted Answer

Facilitates erection by filling with blood during sexual arousal

Question 14

Which of the following is a characteristic of semen that contributes to successful fertilization?

Accepted Answer

Contains approximately 20–150 million sperm cells per mL and is alkaline to neutralize vaginal acidity

Question 15

Which of the following muscles is NOT directly related to the male reproductive system in the pelvic region?

Accepted Answer

Biceps femoris

Question 16

Which of the following cell types is responsible for producing testosterone in the testes?

Accepted Answer

Interstitial endocrine cells (Leydig cells)

Question 17

Which of the following best explains why the vas deferens runs on top of the urinary bladder?

Accepted Answer

To allow the vas deferens to join the seminal vesicles and form the ejaculatory duct

Question 18

Which of the following is a plausible risk associated with circumcision?

Accepted Answer

Infection at the surgical site

Question 19

Which of the following best describes the function of myoid cells in the seminiferous tubules?

Accepted Answer

Contract to help move sperm and testicular fluid through the tubules

Question 20

Which of the following best describes the fluctuations in blood testosterone levels from conception to old age?

Accepted Answer

High during fetal development, low during childhood, surge at puberty, gradual decline with age

Male Reproductive System Study Guide – Step-by-Step Guidance

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