Question 1

Which of the following best describes the main function of the seminiferous tubules in the testes?

Accepted Answer

They produce sperm cells through spermatogenesis.

Question 2

During which phase of meiosis does crossing over, which increases genetic diversity, primarily occur?

Accepted Answer

Prophase I

Question 3

A patient has a mutation that prevents the production of LH (Luteinizing Hormone). Which of the following is the most likely consequence?

Accepted Answer

Decreased testosterone production

Question 4

Which structure in the male reproductive system is responsible for the secretion of a fructose-rich, alkaline fluid that nourishes sperm?

Accepted Answer

Seminal vesicle

Question 5

What is the correct chromosomal content of a secondary spermatocyte after meiosis I?

Accepted Answer

$$23$$ chromosomes, each with $$2$$ chromatids

Question 6

Which hormone directly inhibits the secretion of FSH from the anterior pituitary?

Accepted Answer

Inhibin

Question 7

A male patient has a blockage in his vas deferens. Which process will be directly affected?

Accepted Answer

Sperm transport from epididymis to ejaculatory duct

Question 8

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

Accepted Answer

Acrosome

Question 9

If the scrotum fails to regulate the temperature of the testes, which process is most likely to be impaired?

Accepted Answer

Spermatogenesis

Question 10

Which of the following best explains why sperm cells have a high concentration of mitochondria in their midpiece?

Accepted Answer

To provide energy for movement

Question 11

Which of the following is the correct sequence of sperm cell development in the seminiferous tubules?

Accepted Answer

Spermatogonia → Primary spermatocyte → Secondary spermatocyte → Spermatid → Spermatozoa

Question 12

Which structure is responsible for activating and enhancing sperm motility by secreting an acidic fluid?

Accepted Answer

Prostate gland

Question 13

A male patient has a genetic defect that prevents the formation of the blood-testis barrier. Which cell type is most directly affected?

Accepted Answer

Sustentacular (Sertoli) cells

Question 14

Which of the following best describes the feedback regulation of testosterone on the hypothalamic-pituitary-gonadal axis?

Accepted Answer

Testosterone inhibits GnRH and LH secretion

Question 15

Which of the following is a direct effect of FSH (Follicle Stimulating Hormone) in the male reproductive system?

Accepted Answer

Stimulates meiosis in primary spermatocytes

Question 16

A patient presents with a low sperm count and underdeveloped secondary sexual characteristics. Which hormone is most likely deficient?

Accepted Answer

Testosterone

Question 17

Which of the following best describes the chromosomal content of a mature sperm cell?

Accepted Answer

$$23$$ chromosomes, each with $$1$$ chromatid

Question 18

Which gland secretes a mucus-like fluid that lubricates the urethra prior to ejaculation?

Accepted Answer

Bulbourethral gland

Question 19

Which of the following is the primary function of the epididymis?

Accepted Answer

Sperm maturation and storage

Question 20

Which of the following best explains the importance of meiosis in sexual reproduction?

Accepted Answer

It reduces the chromosome number by half, ensuring genetic diversity.

The Male Reproductive System

Study Guide - Practice Questions