What is the function of the seminiferous tubules in males?

Correct Answer: C

Rationale: The correct answer is C: Produce sperm. Seminiferous tubules are the site of spermatogenesis, the process by which sperm are produced in the testes. Sperm cells are generated through a series of cell divisions and maturation processes within the seminiferous tubules. Therefore, the primary function of the seminiferous tubules in males is to produce sperm cells. A: Store sperm - While the epididymis and vas deferens are responsible for storing sperm, the seminiferous tubules are not primarily involved in sperm storage. B: Produce seminal fluid - Seminal fluid is produced by the accessory glands such as the prostate gland and seminal vesicles, not the seminiferous tubules. D: Transport sperm - Sperm transport occurs through the vas deferens and other ducts, not within the seminiferous tubules.

Correct Answer: C

Rationale: The correct answer is C: Oxytocin. Oxytocin is the hormone responsible for stimulating uterine contractions during labor. It is produced by the hypothalamus and released by the pituitary gland. Oxytocin plays a crucial role in initiating and sustaining labor contractions by acting on the smooth muscle of the uterus. Estrogen and FSH are not directly involved in uterine contractions. Prostaglandins play a role in cervical ripening and softening but are not the primary hormone responsible for stimulating uterine contractions during labor.

Correct Answer: A

Rationale: Estrogen is the correct answer because it is responsible for thickening the cervical mucus during ovulation. Estrogen levels increase during the follicular phase of the menstrual cycle, leading to the production of thick, clear mucus that helps sperm travel to the egg for fertilization. Progesterone, FSH, and LH do not directly influence cervical mucus consistency during ovulation.

Correct Answer: C

Rationale: The correct answer is C, the Fallopian tube. Fertilization typically occurs in the ampulla of the Fallopian tube, where the egg and sperm meet. This site provides the ideal environment for fertilization due to the presence of cilia that help move the egg and sperm towards each other. Additionally, the Fallopian tube provides nourishment and support for the developing embryo before it travels to the uterus for implantation. The other choices are incorrect because: A: The ovary is the site where eggs are produced but not where fertilization occurs. B: The cervix is the lower part of the uterus and serves as a passageway for sperm to enter the uterus but not the site of fertilization. D: The uterus is where the fertilized egg implants and develops into a fetus, but fertilization itself does not occur in the uterus.

Correct Answer: C

Rationale: Estrogen is the correct answer as it plays a key role in regulating the menstrual cycle by stimulating the growth of the uterine lining. It also triggers ovulation and helps maintain the pregnancy if fertilization occurs. FSH and LH are involved in the release of eggs and development of follicles but are not primarily responsible for regulating the entire menstrual cycle. Progesterone is important for preparing the uterus for potential pregnancy but is not the primary regulator of the menstrual cycle.