Anterior to the vagina and urethral openings is the

Correct Answer: A

Rationale: The correct answer is A: Labia majora. The labia majora are located anterior to the vagina and urethral openings, providing protection and support. The labia minora are internal to the labia majora. The mons pubis is the rounded mass of fatty tissue located over the pubic symphysis. Cervical sphincter is not a relevant anatomical structure in this context. Therefore, the labia majora is the correct choice based on its anatomical location and function.

Correct Answer: D

Rationale: The correct answer is D: Nipple. The mammary papilla refers to the nipple, the protruding part of the breast where milk is released during breastfeeding. It is the anatomical structure that connects the lactiferous ducts to the outside of the body. The other choices are incorrect because: A: Areola is the darker area surrounding the nipple. B: Lactiferous duct is the tube that carries milk from the mammary glands to the nipple. C: Sinuses are not directly related to the mammary papilla.

Correct Answer: D

Rationale: The correct answer is D: Human chorionic gonadotropin (hCG). This hormone is released from the placenta during pregnancy and is essential for maintaining the corpus luteum, which in turn produces progesterone to support the pregnancy. hCG is also the hormone detected in pregnancy tests. Choice A (Follicle stimulating hormone) and B (Luteinizing hormone) are involved in the menstrual cycle, not specifically released from the placenta. Choice C (Estrogen) is produced by the ovaries and not directly released from the placenta.

Correct Answer: C

Rationale: The correct answer is C: Eunuch. When a male is castrated before puberty, he becomes a eunuch because castration removes the testes, leading to a lack of testosterone production and loss of male secondary sexual characteristics. This results in a eunuch having a more neutral appearance and lacking the ability to reproduce. A: Choosing "Female" is incorrect because castration does not change the individual's genetic sex. B: Selecting "Cretin" is incorrect as cretinism is a condition caused by severe thyroid hormone deficiency, not related to castration. D: Opting for "Potent" is incorrect as castration leads to the loss of reproductive ability, making the individual infertile.

Correct Answer: C

Rationale: The correct answer is C: Abdominal cavity. During embryonic development, the male gonads (testes) initially form in the abdominal cavity near the kidneys. They then descend through the inguinal canal into the scrotum. The pelvic cavity (choice A) is below the abdominal cavity, the peritoneal cavity (choice B) is a part of the abdominal cavity, and the cul-de-sac (choice D) is a pouch in the pelvic cavity. The key point is understanding the anatomical path of descent of the male gonads from the abdominal cavity to the scrotum.