Q: Which of the following equations represents the number of sperm cells produced from one primary spermatocyte after meiosis?

$$1 \text{ primary spermatocyte} \rightarrow 4 \text{ sperm cells}$$

Question 1

Which of the following best describes the function of the blood-testis barrier formed by sustentacular cells in the seminiferous tubules?

Accepted Answer

It separates developing sperm cells from the immune system, preventing an autoimmune response.

Question 2

During meiosis I, homologous chromosomes are separated, resulting in cells with half the original chromosome number. What is the term for this reduction in chromosome number?

Accepted Answer

Reduction division

Question 3

A patient presents with an enlarged prostate and difficulty urinating. Which hormone is commonly measured in the blood to screen for prostate cancer or benign prostatic hyperplasia?

Accepted Answer

Prostate-specific antigen (PSA)

Question 4

Which of the following equations correctly represents the chromosome number in a diploid human somatic cell?

Accepted Answer

$$2n = 46$$

Question 5

Which structure in the male reproductive system is responsible for storing sperm and promoting their maturation?

Accepted Answer

Epididymis

Question 6

A woman is diagnosed with primary ovarian insufficiency. Which of the following is most likely to be affected?

Accepted Answer

Production of estrogens and oocytes

Question 7

Which hormone is primarily responsible for stimulating the development of secondary sex characteristics in males during puberty?

Accepted Answer

Testosterone

Question 8

During the menstrual phase of the uterine cycle, which layer of the endometrium is shed?

Accepted Answer

Stratum functionalis

Question 9

Which of the following best explains why sperm are produced in large numbers compared to oocytes?

Accepted Answer

Many sperm are needed to produce enough enzymes to penetrate the oocyte and increase the chance of fertilization.

Question 10

Which of the following equations represents the number of sperm cells produced from one primary spermatocyte after meiosis?

Accepted Answer

$$1 	ext{ primary spermatocyte} ightarrow 4 	ext{ sperm cells}$$

Question 11

Which of the following is a function of the corpus luteum during the luteal phase of the ovarian cycle?

Accepted Answer

Secretes progesterone and some estrogen to maintain the uterine lining

Question 12

A patient is prescribed oral contraceptives containing synthetic estrogens and progesterones. What is the primary mechanism by which these prevent pregnancy?

Accepted Answer

They provide negative feedback to inhibit LH and FSH release, preventing follicle maturation and ovulation.

Question 13

Which of the following best describes the process of capacitation in sperm?

Accepted Answer

It is completed in the female reproductive tract and involves changes that enable sperm to penetrate and fertilize an immature female gamete.

Question 14

Which of the following is a plausible explanation for why the scrotum and spermatic cord regulate the temperature of the testes?

Accepted Answer

Sperm develop best at temperatures about 3°C below core body temperature.

Question 15

Which of the following equations represents the number of chromosomes in a human zygote after fertilization?

Accepted Answer

$$2n = 46$$

Question 16

Which of the following is a major risk factor for breast cancer according to the study materials?

Accepted Answer

Maternal relatives with breast cancer and presence of BRCA1 or BRCA2 genes

Question 17

Which of the following best describes the effect of estrogens on bone health?

Accepted Answer

Estrogens reduce breakdown of bone by inhibiting osteoclasts.

Question 18

Which of the following sexually transmitted infections is most likely to cause infertility due to pelvic inflammatory disease?

Accepted Answer

Chlamydia

Question 19

Which of the following equations represents the number of mature secondary oocytes produced in a woman's lifetime?

Accepted Answer

$$	ext{Approximately } 400-500$$

Question 20

Which of the following is a plausible reason for the use of copper in intrauterine devices (IUDs) for birth control?

Accepted Answer

Copper poisons sperm and oocytes, preventing fertilization and implantation.

The Reproductive System: Structure, Function, and Regulation

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