Question 1

Which of the following best describes the main function of the hypothalamic-pituitary-gonadal (HPG) axis in the reproductive system?

Accepted Answer

It regulates the production of gametes and sex hormones through a sequence of hormonal events.

Question 2

During meiosis, what is the significance of crossing over between nonsister chromatids?

Accepted Answer

It increases genetic variability among gametes.

Question 3

A patient presents with a painless, solid mass in the testis. Which condition should be considered, and what is a major risk factor?

Accepted Answer

Testicular cancer; cryptorchidism

Question 4

Which hormone is primarily responsible for stimulating the Leydig (interstitial endocrine) cells to produce testosterone?

Accepted Answer

Luteinizing hormone (LH)

Question 5

Which of the following is a direct result of the corpus luteum degenerating in the absence of fertilization?

Accepted Answer

A sharp decrease in estrogen and progesterone levels

Question 6

Which structure in the male reproductive system is homologous to the female clitoris?

Accepted Answer

Penis

Question 7

A vasectomy involves cutting and ligating which structure, and what is the physiological consequence?

Accepted Answer

Ductus deferens; sperm cannot reach the urethra

Question 8

Which phase of the uterine (menstrual) cycle is characterized by the regeneration of the stratum functionalis and increased estrogen levels?

Accepted Answer

Proliferative (preovulatory) phase

Question 9

Which of the following best explains why the testes are located in the scrotum outside the abdominopelvic cavity?

Accepted Answer

A lower temperature is necessary for proper sperm production.

Question 10

Which of the following is a key difference between oogenesis and spermatogenesis?

Accepted Answer

Oogenesis produces one viable ovum and polar bodies, while spermatogenesis produces four viable sperm.

Question 11

A woman with a history of strenuous physical activity presents with amenorrhea and decreased bone density. Which hormone is most likely deficient in her adipose tissue?

Accepted Answer

Leptin

Question 12

Which of the following events occurs during the luteal phase of the ovarian cycle?

Accepted Answer

The corpus luteum secretes progesterone and some estrogen.

Question 13

Which of the following is a function of the blood-testis barrier formed by sustentocytes?

Accepted Answer

It prevents sperm antigens from escaping into the blood and triggering an immune response.

Question 14

Which hormone is primarily responsible for the development of male secondary sex characteristics such as deepening of the voice and increased muscle mass?

Accepted Answer

Testosterone

Question 15

A patient is diagnosed with Klinefelter’s syndrome. Which of the following karyotypes is most likely present?

Accepted Answer

$$XXY$$

Question 16

Which of the following best describes the role of relaxin in semen?

Accepted Answer

It enhances sperm motility.

Question 17

Which of the following sexually transmitted infections is caused by a virus and is linked to cervical cancer?

Accepted Answer

Human papillomavirus (HPV)

Question 18

Which event marks the completion of meiosis I in oogenesis?

Accepted Answer

Formation of a secondary oocyte and the first polar body

Question 19

Which of the following is a direct effect of inhibin released by sustentocytes in the male reproductive system?

Accepted Answer

It inhibits FSH release from the anterior pituitary.

Question 20

A patient with benign prostatic hyperplasia is most likely to experience which of the following symptoms?

Accepted Answer

Difficulty urinating due to urethral constriction

Study Notes: The Reproductive System (Human Anatomy & Physiology, Ch. 27)

Study Guide - Practice Questions

Study Guide - Flashcards