What is the role of the myometrium in the uterus?

Correct Answer: C

Rationale: The myometrium is the muscular layer of the uterus responsible for contracting during labor to facilitate childbirth. It helps push the baby out. Choice A is incorrect as the myometrium does not support the endometrial lining. Choice B is incorrect as the myometrium does not facilitate implantation. Choice D is incorrect as the myometrium does not secrete estrogen.

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: B

Rationale: Progesterone during pregnancy maintains the uterine lining by supporting the implantation and growth of the embryo. This hormone helps prevent the shedding of the uterine lining which is crucial for a successful pregnancy. Progesterone does not stimulate uterine contractions (choice A), inhibit ovulation (choice C), or stimulate milk production (choice D) during pregnancy.

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.