Which of the following is true regarding the fallopian tubes?

Correct Answer: C

Rationale: The correct answer is C because the fallopian tubes transport the ovum from the ovary to the uterus for fertilization. This is their primary function in the reproductive system. Choice A is incorrect because the ovaries produce eggs, not the fallopian tubes. Choice B is incorrect as the fallopian tubes do not transport sperm but rather the egg. Choice D is also incorrect because estrogen is produced by the ovaries and other tissues, not by the fallopian tubes. In summary, the fallopian tubes serve as a pathway for the ovum to travel from the ovary to the uterus for potential fertilization.

Correct Answer: B

Rationale: The main function of the testes in males is to produce sperm. Sperm production, known as spermatogenesis, occurs within the seminiferous tubules of the testes. Testosterone is primarily secreted by the Leydig cells in the testes, not the main function. Storing sperm is not a primary function, as sperm is continuously produced and released. Transporting sperm is mainly done by the vas deferens, not the testes themselves. Therefore, the correct answer is B, as it directly relates to the primary function of the testes in males.

Correct Answer: B

Rationale: The correct answer is B: FSH. The pituitary gland produces follicle-stimulating hormone (FSH), which plays a key role in reproductive functions. FSH stimulates the growth and maturation of ovarian follicles in females and sperm production in males. A: Progesterone is produced by the ovaries and placenta in females. C: Estrogen is produced by the ovaries and adrenal glands in females. D: Testosterone is produced by the testes in males and in smaller amounts by the ovaries and adrenal glands in females.

Correct Answer: B

Rationale: The correct answer is B: Oxytocin. Oxytocin is the hormone responsible for stimulating the release of milk from the mammary glands. It acts by causing the contraction of the myoepithelial cells surrounding the alveoli in the breast, leading to the ejection of milk into the ducts. Estrogen (A) and FSH (D) are not directly involved in milk release. Prolactin (C) plays a role in milk production but not in the actual release of milk.

Correct Answer: B

Rationale: The correct answer is B: Oxytocin. Oxytocin is responsible for stimulating uterine contractions during labor. It is produced by the hypothalamus and released by the pituitary gland. Oxytocin acts on the smooth muscles of the uterus to initiate and regulate contractions, aiding in the progression of labor. Progesterone (A) helps maintain the uterine lining during pregnancy, while Prolactin (C) stimulates milk production. FSH (D) is a hormone that stimulates the growth and maturation of ovarian follicles in the ovaries.