Question 1

Which of the following best describes the role of the hypothalamic-pituitary-gonadal (HPG) axis in regulating reproductive function in both males and females?

Accepted Answer

It coordinates the release of GnRH, FSH, and LH, which regulate sex hormone secretion and gamete production.

Question 2

A 16-year-old male presents with delayed puberty and low testosterone levels. Laboratory tests reveal low LH and FSH. Which structure is most likely malfunctioning?

Accepted Answer

Anterior pituitary gland

Question 3

Which of the following events is unique to meiosis and contributes to genetic variability in gametes?

Accepted Answer

Crossing over of homologous chromosomes

Question 4

During spermatogenesis, what is the correct sequence of cell types from stem cell to mature sperm?

Accepted Answer

Spermatogonia → Primary spermatocyte → Secondary spermatocyte → Spermatid → Spermatozoon

Question 5

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

Accepted Answer

Luteinizing hormone (LH)

Question 6

A patient is diagnosed with a blockage in the ductus deferens. Which of the following is the most likely consequence?

Accepted Answer

Sperm cannot be transported from the epididymis to the urethra during ejaculation.

Question 7

Which of the following best explains why the scrotum is located outside the body cavity?

Accepted Answer

To maintain a temperature slightly lower than core body temperature, which is essential for viable sperm production

Question 8

Which structure in the female reproductive system is responsible for capturing the ovulated oocyte and moving it toward the uterus?

Accepted Answer

Fimbriae of the uterine tube

Question 9

A woman’s endometrial biopsy shows a thick, nutrient-rich endometrium with active glandular secretion. Which phase of the uterine cycle is she most likely in?

Accepted Answer

Secretory phase

Question 10

Which of the following best describes the feedback mechanism by which testosterone regulates its own production?

Accepted Answer

Testosterone inhibits the hypothalamus and anterior pituitary, reducing GnRH, FSH, and LH secretion.

Question 11

Which of the following sexually transmitted infections is caused by a virus and is associated with an increased risk of cervical cancer?

Accepted Answer

Human papillomavirus (HPV)

Question 12

During oogenesis, what triggers the completion of meiosis II in the secondary oocyte?

Accepted Answer

Fertilization by a sperm cell

Question 13

Which hormone is primarily responsible for stimulating the growth of the endometrial functional layer during the proliferative phase of the uterine cycle?

Accepted Answer

Estrogen

Question 14

A genetic male (XY) embryo is exposed to a drug that blocks testosterone production during development. Which of the following is the most likely outcome?

Accepted Answer

Development of female accessory structures and external genitalia

Question 15

Which of the following best explains why menopause increases the risk for osteoporosis in women?

Accepted Answer

Decreased estrogen levels reduce bone mass by increasing bone resorption.

Question 16

Which of the following is a function of the sustentocytes (Sertoli cells) in the seminiferous tubules?

Accepted Answer

Formation of the blood-testis barrier and nourishment of developing sperm

Question 17

A patient with a mutation that prevents the production of androgen-binding protein (ABP) would most likely experience which of the following?

Accepted Answer

Impaired spermatogenesis due to inability to concentrate testosterone in the seminiferous tubules

Question 18

Which of the following best describes the role of the corpus luteum in the ovarian cycle?

Accepted Answer

It produces progesterone and estrogens to maintain the endometrium during the luteal phase.

Question 19

Which of the following equations best represents the reduction in chromosome number during meiosis?

Accepted Answer

$$2n \rightarrow n$$

Question 20

A woman with low body fat and intense exercise regimen experiences amenorrhea (absence of menstruation). Which hormone is most likely reduced, leading to this condition?

Accepted Answer

Leptin

Chapter 27: The Reproductive System – Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards