Which hormone is responsible for the stimulation of uterine contractions during labor?

Correct Answer: B

Rationale: The correct answer is B: Oxytocin. Oxytocin is responsible for stimulating uterine contractions during labor. It is produced by the hypothalamus and released by the pituitary gland. Oxytocin acts on the smooth muscles of the uterus to initiate and regulate contractions, aiding in the progression of labor. Progesterone (A) helps maintain the uterine lining during pregnancy, while Prolactin (C) stimulates milk production. FSH (D) is a hormone that stimulates the growth and maturation of ovarian follicles in the ovaries.

Correct Answer: B

Rationale: The correct answer is B: Capture the egg after ovulation. Rationale: 1. Fimbriae are finger-like projections at the end of the fallopian tube. 2. After ovulation, the fimbriae help in capturing the released egg from the ovary. 3. The captured egg is then transported to the fallopian tube for potential fertilization. Summary: A: Incorrect - Fimbriae do not transport the egg from the ovary to the uterus. C: Incorrect - Fimbriae do not support fertilization directly. D: Incorrect - Fimbriae do not release hormones.

Correct Answer: D

Rationale: The correct answer is D: LH (luteinizing hormone). LH is responsible for stimulating the release of eggs from the ovaries during ovulation. This hormone triggers the final maturation and release of the egg from the ovarian follicle. Estrogen and progesterone play roles in the menstrual cycle but do not directly stimulate egg release. FSH (follicle-stimulating hormone) is involved in follicle development but does not trigger egg release. Therefore, LH is the correct choice for its specific role in ovulation.

Correct Answer: B

Rationale: The correct answer is B: Secrete seminal fluid. Seminal vesicles produce and secrete seminal fluid, which is a major component of semen. This fluid provides nutrients and protection for sperm, aiding in their motility and survival. Storing sperm (choice A) is primarily the function of the epididymis. Testosterone production (choice C) occurs in the testes, while sperm production (choice D) takes place in the testes as well. Therefore, choice B is the correct answer as seminal vesicles specifically contribute to the production of seminal fluid.

Correct Answer: D

Rationale: The primary function of the uterine tubes (fallopian tubes) is to transport eggs from the ovary to the uterus for potential fertilization. This process involves capturing an egg released from the ovary, providing a site for fertilization by sperm, and conducting the fertilized egg (zygote) to the uterus for implantation. Choice A is incorrect because sperm are not transported through the fallopian tubes. Choice B is incorrect as the fallopian tubes do not store eggs but rather facilitate their movement. Choice C is incorrect as fertilization occurs in the fallopian tubes but they do not actively support the process.