Which hormone is responsible for the development of male secondary sexual characteristics?

Correct Answer: B

Rationale: Testosterone is the correct answer because it is the primary male sex hormone responsible for the development of male secondary sexual characteristics such as facial hair, deep voice, and muscle growth. Estrogen (A) is the primary female sex hormone, progesterone (C) is involved in menstrual cycle regulation, and FSH (D) is a hormone that stimulates egg production in females.

Correct Answer: A

Rationale: The correct answer is A: Epididymis. The epididymis is a tightly coiled tube where sperm are stored and matured until ejaculation. It allows for the concentration and storage of sperm produced by the testes. The other choices are incorrect because: B: Seminal vesicles produce a fluid that nourishes and protects sperm, not store sperm. C: Vas deferens transports sperm from the epididymis to the urethra, but doesn't store sperm. D: Prostate gland produces a fluid that mixes with sperm to form semen, but does not store sperm.

Correct Answer: A

Rationale: The correct answer is A: Maturation and storage of sperm. The epididymis is a coiled tube where sperm mature and are stored before ejaculation. Sperm are produced in the testes, not the epididymis, so choice B is incorrect. Seminal fluid is produced by the seminal vesicles and prostate gland, not the epididymis, making choice C incorrect. Lastly, the vas deferens is responsible for transporting sperm to the urethra, not the epididymis, so choice D is incorrect.

Correct Answer: A

Rationale: The mucous plug in the cervix during pregnancy serves to prevent infection by acting as a physical barrier, blocking the entry of harmful pathogens into the uterus and protecting the developing fetus. It does not facilitate sperm transport, as sperm travel through the cervical canal before pregnancy. It also does not enhance uterine contractions or nourish the embryo, as those functions are carried out by other mechanisms in the body during pregnancy.

Correct Answer: D

Rationale: Correct Answer: D - Progesterone Rationale: 1. Progesterone maintains the uterine lining for implantation and supports fetal development. 2. It inhibits contractions to prevent premature labor. 3. Estrogen helps with fetal development but is not the primary hormone during pregnancy. 4. Prolactin is responsible for milk production after birth, not fetal development. 5. hCG is produced early in pregnancy but does not directly support fetal development.