What is the function of the fallopian tubes?

Correct Answer: A

Rationale: The correct answer is A: Transport eggs from the ovaries to the uterus. The fallopian tubes serve as the pathway for the egg released by the ovary to travel towards the uterus for potential fertilization. This transportation process is essential for successful conception. Choices B, C, and D are incorrect because the fallopian tubes do not produce eggs, support implantation, or secrete estrogen. Eggs are produced in the ovaries, implantation occurs in the uterus, and estrogen is primarily produced by the ovaries and other endocrine glands.

Correct Answer: A

Rationale: Morning sickness is a common sign of pregnancy caused by hormonal changes. It typically occurs in the first trimester. The other choices are not signs of pregnancy. Luteal phase defect is a menstrual cycle disorder, mature corpus luteum is a normal part of the menstrual cycle, and dysmenorrhea is painful periods. Thus, A is the correct answer as it directly relates to pregnancy.

Correct Answer: C

Rationale: The acrosome in sperm contains enzymes that help it penetrate the egg during fertilization. These enzymes break down the outer layer of the egg, allowing the sperm to enter and fertilize it. This makes choice C the correct answer. Choices A and D are incorrect because the acrosome is not responsible for providing energy for movement or producing enzymes for sperm maturation. Choice B is also incorrect as storing sperm is not the primary role of the acrosome.

Correct Answer: A

Rationale: The correct answer is A: Seminal vesicles. Seminal vesicles are responsible for producing the majority of the fluid in semen, contributing to sperm motility and viability. The other choices are incorrect because: B: Epididymis stores and transports sperm; C: Testes produce sperm; D: Vas deferens transports sperm from the epididymis to the urethra.

Correct Answer: A

Rationale: Estrogen is responsible for thickening the endometrial lining during the proliferative phase of the menstrual cycle to prepare for pregnancy. It stimulates the growth and development of the endometrium. Progesterone, not FSH or LH, is responsible for maintaining the endometrial lining after it has been thickened by estrogen. FSH is involved in stimulating the growth of ovarian follicles, while LH triggers ovulation. Therefore, the correct answer is A (Estrogen) as it directly influences the thickening of the endometrial lining for pregnancy preparation.