Which of the following hormones stimulates the release of eggs during ovulation?

Correct Answer: A

Rationale: The correct answer is A: LH (Luteinizing Hormone). LH surge triggers ovulation by stimulating the release of eggs from the ovary. It works in conjunction with FSH to facilitate follicle development. Estrogen supports the growth of the uterine lining, while progesterone maintains it post-ovulation. FSH is responsible for follicle development but isn't the primary hormone for egg release.

Correct Answer: A

Rationale: Estrogen is the correct answer as it is the primary hormone responsible for the development of the female reproductive system during puberty. It stimulates the growth of the ovaries, regulates the menstrual cycle, and promotes the development of secondary sexual characteristics. Progesterone is involved in maintaining pregnancy, not puberty. FSH (Follicle Stimulating Hormone) is involved in the maturation of ovarian follicles, not overall reproductive system development. Testosterone is a male sex hormone and is not primarily responsible for the development of the female reproductive system.

Correct Answer: D

Rationale: The correct answer is D (All of the above) because all three hormones (FSH, LH, and Estrogen) play crucial roles in regulating the menstrual cycle. FSH stimulates the growth of ovarian follicles, LH triggers ovulation and promotes the formation of the corpus luteum, and Estrogen helps in the development and maintenance of the uterine lining. Together, these hormones work in a coordinated manner to ensure the proper functioning of the menstrual cycle. Therefore, selecting all of the above is the correct choice as each hormone is indispensable in the regulation of the menstrual cycle.

Correct Answer: A

Rationale: The primary function of the ovaries in females is to produce eggs, which are essential for reproduction. Ovaries contain structures called follicles that release mature eggs during ovulation. This process is crucial for fertilization to occur. The other choices are incorrect because storing sperm is the function of the male reproductive system, producing estrogen and progesterone is a function of the ovaries but not the primary one, and facilitating fertilization is a process that involves multiple reproductive structures, not just the ovaries. Hence, choice A is the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Provide oxygen and nutrients to the fetus. The placenta acts as a bridge between the mother and fetus, allowing the exchange of oxygen and nutrients necessary for fetal growth and development. It also helps in removing waste products from the fetus. Choices A and D are incorrect as the placenta does not excrete waste products or help in the production of milk. Choice C is incorrect as the placenta does not store the fetus but rather provides essential support and nourishment during pregnancy.