What is the function of the myometrium during pregnancy?

Correct Answer: C

Rationale: The myometrium is the muscular layer of the uterus responsible for contractions during labor. It helps in the expulsion of the fetus by contracting and pushing the baby out of the uterus during childbirth. This process is essential for the safe delivery of the baby. A: Facilitating implantation is the role of the endometrium, not the myometrium. B: Providing nutrients to the embryo is the function of the placenta, not the myometrium. D: Secretion of estrogen is primarily carried out by the ovaries, not the myometrium. Therefore, the correct answer is C as the myometrium plays a crucial role in the expulsion of the fetus during labor.

Correct Answer: C

Rationale: The pituitary gland in the male reproductive system secretes follicle-stimulating hormone (FSH) and luteinizing hormone (LH) to regulate sperm production. FSH stimulates sperm production in the testes, while LH stimulates the production of testosterone by the Leydig cells. This hormonal regulation is essential for maintaining proper sperm production and male reproductive function. Choices A and D are incorrect because the pituitary gland does not secrete estrogen or testosterone directly. Choice B is incorrect because sperm production is not directly produced by the pituitary gland but is regulated by the hormones it secretes.

Correct Answer: B

Rationale: The correct answer is B: Estrogen. Estrogen is primarily responsible for regulating the menstrual cycle in females by stimulating the growth of the uterine lining. It also plays a key role in ovulation. FSH stimulates the growth of ovarian follicles, LH triggers ovulation, and Progesterone helps maintain the uterine lining after ovulation. However, Estrogen is the main hormone that drives the menstrual cycle's key phases.

Correct Answer: A

Rationale: Estrogen is the correct answer as it stimulates the growth of the uterine lining during the menstrual cycle. Estrogen is produced by the ovaries and peaks around ovulation, promoting the thickening of the endometrium to prepare for potential implantation. Progesterone, on the other hand, helps maintain the uterine lining after it has been thickened by estrogen. FSH and LH are involved in follicle development and ovulation, respectively, but they do not directly stimulate uterine lining growth.

Correct Answer: A

Rationale: The correct answer is A because the prostate gland produces seminal fluid, which is a key component of semen. This fluid helps nourish and protect sperm. The other choices are incorrect because the prostate gland does not store sperm (B), produce eggs (C), or secrete testosterone (D). Sperm is primarily stored in the epididymis, eggs are produced in the ovaries, and testosterone is mainly secreted by the testes. Therefore, the prostate gland's main function is to produce seminal fluid, making choice A the correct answer.