FSH causes several immature EGGS, along with their surrounding FOLLICLE cells, in the ovaries to begin to develop. The developing follicle cells release increasing amounts of ________________.

Correct Answer: B

Rationale: Step-by-step rationale: 1. FSH stimulates development of follicles in ovaries. 2. Follicle cells release estrogen. 3. Estrogen levels increase as follicles develop. 4. Estrogen plays key role in menstrual cycle regulation. Therefore, the correct answer is B (estrogen). Other choices are incorrect: A (hormones are broad, not specific), C (progesterone is released after ovulation), D (implantation occurs in the uterus, not ovaries).

Correct Answer: C

Rationale: Step-by-step rationale: 1. The seminal vesicle secretes a fluid eliminated in the ejaculatory ducts. 2. This fluid provides nutrients and energy for the sperm. 3. It also helps to neutralize the acidic environment of the male urethra. 4. The fluid from the seminal vesicle combines with sperm to form semen for ejaculation. Summary: A: The seminal vesicle does not secrete androgenic hormones. B: Sperm cells are not secreted by the seminal vesicle. D: The seminal vesicle's fluid does not transport sperm cells; it provides support and nourishment for them.

Correct Answer: A

Rationale: The correct answer is A: prostate. Testosterone is primarily secreted by the testicular interstitial cells (Leydig cells) in the testes. The seminiferous tubules are responsible for spermatogenesis, not testosterone secretion. Straight tubules are involved in transporting sperm. The prostate gland produces prostatic fluid, not testosterone. Therefore, the prostate is not a structure that secretes testosterone.

Correct Answer: A

Rationale: Step 1: The cortical area of the ovary is the outer layer where follicles develop. Step 2: Primordial follicles are the earliest stage of follicle development, found in the cortex. Step 3: Mature follicles are developed follicles located deeper in the ovary, not in the cortex. Step 4: Secondary follicles are also more developed than primordial follicles, located deeper. Step 5: Blood vessels are important for supplying nutrients but are not specific to the cortical area. Therefore, the correct answer is A as primordial follicles are located in the cortical area, while other choices are found in different regions of the ovary.

Correct Answer: C

Rationale: The corpus luteum is formed from the ruptured follicle after ovulation. It secretes progesterone, which is crucial for preparing the uterus for implantation and maintaining early pregnancy. Progesterone helps thicken the uterine lining and supports embryo development. Estrogens are mainly produced by the ovaries, not the corpus luteum. Testosterone is primarily produced by the adrenal glands and testes, not the corpus luteum. Therefore, choice C is correct as it accurately describes the main hormone secreted by the corpus luteum.