The largest ovarian ligament is the _____ ligament.

Correct Answer: B

Rationale: The correct answer is B: broad ligament. The broad ligament is the largest ovarian ligament, providing support to the uterus and ovaries. It consists of layers of peritoneum and serves as a protective barrier. The other choices are incorrect because the ovarian ligament specifically connects the ovary to the uterus, the suspensory ligament supports the ovary and contains blood vessels, and the sacral ligament is not related to the ovary.

Correct Answer: C

Rationale: The correct answer is C: estrogens. Estrogens inhibit their own secretion through negative feedback. When estrogen levels rise, they signal the hypothalamus and pituitary gland to decrease the production of gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone (FSH), and luteinizing hormone (LH), ultimately leading to a decrease in estrogen secretion. This self-regulation maintains hormonal balance in the body. Incorrect choices: A: FSH - FSH stimulates the production of estrogen by the ovarian follicles, so it does not inhibit estrogen secretion. B: LH - LH also plays a role in stimulating estrogen production and does not inhibit its secretion. D: Progesterone - Progesterone is involved in the menstrual cycle and pregnancy but does not directly inhibit estrogen secretion.

Correct Answer: C

Rationale: The correct answer is C: oxytocin. Myoepithelial cells contract to facilitate milk ejection during breastfeeding. Oxytocin is the hormone responsible for stimulating this contraction. Estrogen and progesterone are involved in breast development and preparing for lactation but do not directly stimulate myoepithelial cell contraction. Prolactin is responsible for milk production but does not directly trigger myoepithelial cell contraction.

Correct Answer: A

Rationale: The correct answer is A: Dartos muscle. The Dartos muscle is a layer of smooth muscle in the scrotum that contracts and relaxes to regulate the temperature of the testes by adjusting their distance from the body for temperature control. The other choices are incorrect because: B: Tunica vaginalis is a serous membrane that surrounds the testes, providing support and lubrication. C: Tunica albuginea is a dense fibrous membrane that covers the testes, providing structural support. D: Seminiferous tubules are the site of sperm production in the testes, but do not play a direct role in temperature regulation.

Correct Answer: D

Rationale: The correct answer is D: Suspensory ligament. The suspensory ligament attaches the ovaries to the pelvic wall and also contains the ovarian artery, vein, and nerves. This structure supports and suspends the ovaries in the pelvic cavity. The broad ligament (A) is a sheet of peritoneum that connects the uterus, fallopian tubes, and ovaries to the pelvic wall. The mesovarium (B) is a fold of peritoneum that attaches the ovaries to the broad ligament. The ovarian ligament (C) attaches the ovaries to the uterus. Therefore, the suspensory ligament is the correct answer as it specifically connects the ovaries to the pelvic wall.