What hormone is responsible for stimulating the production of sperm in males?

Correct Answer: B

Rationale: The correct answer is B: FSH (Follicle-Stimulating Hormone). FSH stimulates the Sertoli cells in the testes to promote sperm production. Testosterone (A) is responsible for male characteristics, not sperm production. LH (C) stimulates testosterone production in the testes but does not directly stimulate sperm production. Prolactin (D) is not involved in sperm production in males. Therefore, FSH is the correct choice as it directly stimulates the production of sperm in males by acting on the Sertoli cells.

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: A

Rationale: Estrogen is the correct answer as it plays a crucial role in regulating the menstrual cycle. It promotes the growth of the uterine lining and stimulates ovulation. Progesterone works in conjunction with estrogen but is primarily involved in preparing the uterus for potential pregnancy. FSH and LH are both involved in the regulation of the menstrual cycle, but they primarily stimulate the development of follicles and ovulation, respectively. Estrogen, however, is the hormone that has a direct and central role in orchestrating the entire menstrual cycle by controlling various processes like follicle development, ovulation, and the thickening of the uterine lining.

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.