Question 1

Which of the following best describes the process depicted in the first image, where a sperm is approaching an egg?

Accepted Answer

Fertilization, where a haploid sperm and a haploid egg unite to form a diploid zygote.

Question 2

In the human life cycle, what is the chromosome number of the zygote immediately after fertilization?

Accepted Answer

$$2n = 46$$

Question 3

Which structure in the male reproductive system is responsible for storing and maturing sperm before they are transported further?

Accepted Answer

Epididymis

Question 4

Which gland in the male reproductive system secretes a fluid that helps neutralize the acidic environment of the vagina?

Accepted Answer

Prostate gland

Question 5

Testosterone is produced by which cells in the testes?

Accepted Answer

Interstitial (Leydig) cells

Question 6

Which hormone stimulates the production of testosterone in males?

Accepted Answer

Luteinizing hormone (LH)

Question 7

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

Accepted Answer

Seminiferous tubules → Epididymis → Ductus deferens → Ejaculatory duct → Urethra

Question 8

Which phase of the uterine cycle is characterized by the degeneration of the endometrial lining and menstruation?

Accepted Answer

Menstrual phase

Question 9

If fertilization occurs, which hormone is secreted by embryonic tissue to maintain the corpus luteum?

Accepted Answer

Human chorionic gonadotropin (hCG)

Question 10

Which of the following best explains why only one sperm typically fertilizes an egg?

Accepted Answer

Once a sperm penetrates the egg, changes in the egg membrane prevent other sperm from entering.

Question 11

Which structure in the female reproductive system is the usual site of fertilization?

Accepted Answer

Upper third of the oviduct (fallopian tube)

Question 12

During which days of the menstrual cycle does ovulation typically occur?

Accepted Answer

Day 14

Question 13

Which hormone is primarily responsible for stimulating the growth of the endometrial lining during the proliferative phase?

Accepted Answer

Estrogen

Question 14

What is the function of the corpus luteum if fertilization does NOT occur?

Accepted Answer

It degenerates, leading to a drop in estrogen and progesterone levels.

Question 15

Which of the following is a correct statement about the chromosome number in human gametes?

Accepted Answer

Gametes are haploid with $$n = 23$$ chromosomes.

Question 16

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

Accepted Answer

Enhances sperm formation by stimulating Sertoli cells.

Question 17

A patient has a mutation that prevents the secretion of GnRH from the hypothalamus. Which of the following would most likely occur?

Accepted Answer

Decreased levels of LH and FSH, leading to reduced testosterone and sperm production.

Question 18

Which of the following is a function of the myometrium in the uterus?

Accepted Answer

Contracts during labor to help expel the fetus.

Question 19

Which of the following best explains why high levels of estrogen and progesterone prevent ovulation during pregnancy?

Accepted Answer

They inhibit the release of FSH and LH from the pituitary gland.

Question 20

Which of the following is a correct statement about identical (monozygotic) twins?

Accepted Answer

They result from the splitting of one fertilized oocyte before the 16-cell stage.

The Human Reproductive System: Structure, Function, and Regulation

Study Guide - Practice Questions