What is the primary function of the prostate gland in males?

Correct Answer: B

Rationale: The correct answer is B: Secrete seminal fluid. The prostate gland secretes a milky, alkaline fluid that makes up a significant portion of semen. This fluid helps nourish and protect sperm, aiding in their motility and fertility. The other choices are incorrect because: A: The production of sperm primarily occurs in the testes. C: Testosterone is mainly produced by the testes and adrenal glands, not the prostate gland. D: Sperm transportation is facilitated by the vas deferens, not the prostate gland.

Correct Answer: B

Rationale: Step 1: The corpus luteum is formed from the ruptured follicle after ovulation. Step 2: It secretes progesterone to maintain the endometrium for potential implantation. Step 3: If fertilization doesn't occur, corpus luteum degenerates, leading to menstruation. Step 4: Thus, the correct answer is B, as it plays a crucial role in endometrial maintenance. Summary: A secretes estrogen, C stimulates ovulation, and D stimulates sperm production, which are not the primary functions of the corpus luteum in the menstrual cycle.

Correct Answer: B

Rationale: The correct answer is B: Support implantation of the fertilized egg. During the menstrual cycle, the uterine lining thickens to provide a nourishing environment for a fertilized egg to implant and develop into a fetus. This is crucial for a successful pregnancy. Choice A is incorrect because the uterine lining supports the implantation of the fertilized egg, not fertilization itself. Choice C is incorrect as the role of the uterine lining is not primarily to protect against infection. Choice D is incorrect as the uterine lining's main function is not to assist with labor but rather to support the early stages of pregnancy.

Correct Answer: C

Rationale: The correct function of the vas deferens is to transport sperm from the epididymis to the urethra for ejaculation. This is a crucial step in the male reproductive system for delivering sperm during ejaculation. The other choices are incorrect because: A: The storage of sperm occurs in the epididymis, not the vas deferens. B: Secretion of seminal fluid is the role of the seminal vesicles and prostate gland, not the vas deferens. D: Testosterone production is primarily carried out by the testes, not the vas deferens.

Correct Answer: C

Rationale: Rationale: 1. The menstrual phase is the phase where the uterine lining sheds. 2. This occurs when there is no pregnancy and the hormone levels drop. 3. Shedding of the lining leads to menstrual bleeding. 4. The follicular phase is characterized by follicle development. 5. The luteal phase follows ovulation and prepares the uterus for a potential pregnancy. 6. Ovulation refers to the release of the egg from the ovary, not shedding of the uterine lining. Summary: - A: Follicular phase - Incorrect, focuses on follicle development. - B: Luteal phase - Incorrect, prepares the uterus for potential pregnancy. - C: Menstrual phase - Correct, characterized by shedding of uterine lining. - D: Ovulation phase - Incorrect, refers to the release of the egg.