In females, which hormone stimulates the release of an egg from the ovary?

Correct Answer: C

Rationale: The correct answer is C: LH (Luteinizing Hormone). LH is responsible for triggering ovulation, the release of an egg from the ovary. It surges around mid-cycle to stimulate the mature egg's release. Estrogen and progesterone play roles in the menstrual cycle but do not directly trigger ovulation. FSH (Follicle-Stimulating Hormone) helps in follicle development but does not induce ovulation. Therefore, LH is the hormone specifically responsible for this crucial reproductive process in females.

Correct Answer: A

Rationale: The correct answer is A: FSH (Follicle-Stimulating Hormone). FSH stimulates the growth and maturation of ovarian follicles in the ovaries. It plays a crucial role in the development of eggs and the regulation of the menstrual cycle. LH (Choice B) is responsible for ovulation, estrogen (Choice C) is produced by the developing follicle, and progesterone (Choice D) is primarily involved in preparing the uterus for pregnancy.

Correct Answer: C

Rationale: The correct answer is C: Epididymis. After sperm is produced in the testes, it moves to the epididymis for storage and maturation. The epididymis is a coiled tube located on the back of each testicle. It stores sperm until they are ready to be ejaculated. The other choices are incorrect because: A: Vas deferens carries sperm from the epididymis to the urethra, B: Seminal vesicles produce seminal fluid, and D: Urethra is a tube that carries urine and semen out of the body, but does not store sperm.

Correct Answer: B

Rationale: The correct answer is B: Support and nourish developing sperm. Sertoli cells provide physical and nutritional support to developing sperm cells, assisting in their maturation process. This function is crucial for sperm production and male fertility. Choices A, C, and D are incorrect because Sertoli cells do not produce testosterone (produced by Leydig cells), store sperm (done by the epididymis), or produce semen (seminal vesicles and prostate gland produce components of semen).

Correct Answer: A

Rationale: During the follicular phase of the menstrual cycle, the follicle stimulating hormone (FSH) stimulates the growth of a dominant follicle, which eventually leads to ovulation. Ovulation typically occurs around the middle of the menstrual cycle, about 14 days before the start of the next menstrual period. This is when the mature egg is released from the ovary into the fallopian tube. Therefore, the correct answer is A: Follicular phase. Choice B: Luteal phase is incorrect because ovulation precedes the luteal phase. Choice C: Menstrual phase is incorrect as ovulation occurs before menstruation. Choice D: Proliferative phase is incorrect because it occurs after ovulation.