Rita Chen, who is 25 years old and knows that she is not pregnant, is concerned because she has not had a menstrual period for three months. Her doctor described this condition as ______.

Correct Answer: B

Rationale: The correct answer is B: amenorrhea. Amenorrhea refers to the absence of menstrual periods, which is the condition Rita Chen is experiencing. Dysmenorrhea is painful periods, not absence of periods. Menometrorrhagia is excessive and prolonged menstrual bleeding. Polymenorrhoea is frequent menstrual periods, not absence of periods. In this case, Rita's lack of periods for three months aligns with the definition of amenorrhea.

Correct Answer: A

Rationale: Step-by-step rationale for the correct answer (A): 1. The prostate gland is an exocrine gland because it secretes its products through ducts onto an epithelial surface. 2. It is a paired organ, with two lobes located above the urethra and below the bladder. 3. The prostate secretes a fluid that contributes to the seminal fluid, not semen itself. 4. The prostate is vascularized by branches of the internal iliac artery, not the entire gland. Therefore, the correct statement is that the prostate is an exocrine glandular organ (Choice A).

Correct Answer: B

Rationale: Step 1: LH (luteinizing hormone) is produced by the pituitary gland and plays a key role in stimulating the Leydig cells in the testes to produce testosterone. Step 2: Testosterone secretion is directly controlled by the LH through this stimulation. Step 3: FSH (follicle-stimulating hormone) is involved in sperm production, not testosterone secretion. Step 4: Corticoadrenal hormones are related to stress response, not testosterone regulation. Step 5: Negative feedback from the posterior pituitary does not directly control testosterone secretion. Therefore, the correct answer is B (the LH) as it directly influences testosterone production.

Correct Answer: B

Rationale: The correct answer is B because ovarian follicles are actually present in the ovary since birth. They are formed during fetal development and remain in a dormant state until puberty. Choice A is incorrect because follicles are located in the medullary area of the ovary, not the cortical area. Choice C is incorrect because follicles are formed before puberty. Choice D is incorrect because follicles do not go through stages of evolution but rather stages of development.

Correct Answer: D

Rationale: The correct answer is D: muscular. The uterus is composed of smooth muscle tissue, allowing it to contract during childbirth and menstruation. This contraction is essential for the expulsion of the fetus or uterine lining. Funnel-shaped (A) and cavitary (C) describe the shape and structure of the uterus, but they do not define its primary function. Unpaired (B) is incorrect as the uterus is a paired organ in the female reproductive system.