What is the role of the corpus luteum after ovulation?

Correct Answer: C

Rationale: The corpus luteum is formed from the ruptured follicle after ovulation. It secretes progesterone to prepare the uterine lining for implantation and maintain pregnancy. This is essential for supporting early pregnancy until the placenta takes over progesterone production. Choices A and D are incorrect as the corpus luteum primarily produces progesterone, not estrogen or stimulates follicle development. Choice B is incorrect as the corpus luteum does not prevent ovulation but rather supports pregnancy post-ovulation.

Correct Answer: B

Rationale: The primary purpose of the placenta during pregnancy is to provide oxygen and nutrients to the fetus. The placenta acts as a bridge between the mother and the fetus, allowing for the exchange of oxygen, nutrients, and waste products. It filters oxygen and nutrients from the mother's blood to the fetus and removes waste products from the fetal blood to the mother's circulation. This process ensures the proper growth and development of the fetus. Choice A is incorrect because the placenta does not excrete waste products, it filters them. Choice C is incorrect as the placenta does not regulate the fetus's temperature. Choice D is incorrect because hCG (human chorionic gonadotropin) is a hormone produced by the embryo, not the placenta.

Correct Answer: C

Rationale: The correct answer is C because the main function of the female reproductive system is to provide a site for fertilization and support embryo development. This includes the production of eggs, the site for fertilization in the fallopian tubes, and the nurturing of the embryo in the uterus. Choices A and D are partially correct as the female reproductive system also produces hormones and regulates the menstrual cycle, but these are not the main functions. Choice B is incorrect as supporting fetal development occurs after fertilization and embryo development, which are the primary functions of the female reproductive system.

Correct Answer: B

Rationale: The correct answer is B: Secretes fluids that make up semen. The prostate gland secretes a milky fluid that makes up a significant portion of semen, aiding in sperm mobility and viability. This fluid also helps neutralize the acidic environment of the vagina, enhancing sperm survival. Option A is incorrect as the testes store sperm, not the prostate gland. Option C is incorrect as testosterone is primarily produced in the testes. Option D is incorrect as sperm production is regulated by the hypothalamus and pituitary gland, not the prostate gland.

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.