Question 1

Which of the following best describes the negative feedback control of reproductive hormones in the male hypothalamic-pituitary-gonadal axis?

Accepted Answer

Testosterone inhibits the release of GnRH from the hypothalamus and LH from the anterior pituitary.

Question 2

During pregnancy, which hormonal change is primarily responsible for the suppression of the ovarian and uterine cycles?

Accepted Answer

High levels of progesterone and estrogen inhibit FSH and LH secretion.

Question 3

What is the main purpose and physiological result of a male vasectomy?

Accepted Answer

To cut and seal the vas deferens, preventing sperm from entering the semen and causing infertility.

Question 4

Which of the following best distinguishes sperm from semen?

Accepted Answer

Sperm are the male gametes, while semen is the fluid containing sperm and secretions from accessory glands.

Question 5

Which of the following is NOT a function of testosterone in the male body?

Accepted Answer

Directly stimulating ovulation

Question 6

Which two cell types are most important for sperm production in the testicles, and what are their primary functions?

Accepted Answer

Sertoli cells support and nourish developing sperm; Leydig cells produce testosterone.

Question 7

During the ovarian cycle, what is the effect of the LH surge, and which hormone is primarily responsible for the proliferative phase of the endometrium?

Accepted Answer

The LH surge triggers ovulation; estrogen is responsible for the proliferative phase.

Question 8

Which of the following best explains the cyclical changes in the endometrial layer of the uterus?

Accepted Answer

Fluctuations in estrogen and progesterone levels cause proliferation, secretion, and shedding of the endometrial lining.

Question 9

Which glands contribute secretions to semen during male arousal and ejaculation, and what is the function of these secretions?

Accepted Answer

Seminal vesicles, prostate gland, and bulbourethral glands; their secretions nourish sperm, neutralize acidity, and lubricate the urethra.

Question 10

A patient presents with erectile dysfunction. Which of the following is a likely physiological cause?

Accepted Answer

Impaired blood flow to the corpora cavernosa of the penis

Question 11

Which of the following best describes the process of oocyte release and fertilization?

Accepted Answer

The oocyte is released from the ovary during ovulation and is typically fertilized by sperm in the uterine tube.

Question 12

Which anatomical structure of the penis is primarily responsible for erection due to its ability to fill with blood?

Accepted Answer

Corpora cavernosa

Question 13

Which of the following statements about the anatomy of the vagina is correct?

Accepted Answer

The vagina is a muscular tube that serves as the site for sperm deposition and the birth canal.

Question 14

Which component of the mammary gland is responsible for milk production?

Accepted Answer

Alveoli

Question 15

A woman is considering birth control options. Which of the following is a valid concern with hormonal contraceptives?

Accepted Answer

Increased risk of blood clots in some individuals

Question 16

A male patient has a normal sperm count but is infertile. Which of the following is the most likely explanation?

Accepted Answer

A vasectomy has blocked the passage of sperm into the semen.

Question 17

Which hormone is primarily responsible for maintaining the secretory phase of the endometrial cycle?

Accepted Answer

Progesterone

Question 18

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

Accepted Answer

Stimulates growth and maturation of ovarian follicles

Question 19

A patient is found to have low testosterone and decreased sperm production. Which cell type is most likely dysfunctional?

Accepted Answer

Leydig cells

Question 20

Which of the following scenarios best illustrates the application of positive feedback in the reproductive system?

Accepted Answer

The LH surge triggered by rising estrogen levels leading to ovulation

Study Guidance for Chapter 26: The Reproductive System

Study Guide - Practice Questions

Study Guide - Flashcards