Which of the following events do not take place after fertilization.

Correct Answer: A

Rationale: After fertilization, the sperm and egg nuclei fuse to form a zygote. The egg completes its first meiotic division before fertilization, so A is incorrect. B is incorrect because the second polar body forms after fertilization. C is incorrect as the egg releases secretory vesicles to block polyspermy post-fertilization. D is incorrect as egg enzymes are activated post-fertilization to initiate embryogenesis. Thus, the answer is A, as the completion of the first meiotic division occurs before fertilization.

Correct Answer: C

Rationale: The correct answer is C: Menstruation. Menstruation is the process where the lining of the uterus sheds along with some blood once a month. This occurs in females who are not pregnant. Gestation (A) refers to the period of development of a baby in the womb. Conception (B) is the fertilization of an egg by sperm. Ovulation (D) is the release of an egg from the ovary. Menstruation best describes the shedding of the uterine lining and blood during a monthly period.

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: B

Rationale: The correct answer is B: lobules, delineated by connective septa. The testicle is structurally organized into lobules separated by connective tissue septa. Each lobule contains seminiferous tubules where sperm production occurs. This organization allows for efficient production and transport of sperm. Incorrect choices: A: Intratesticular spermatic ducts - Incorrect, as the testicle contains seminiferous tubules, not spermatic ducts. C: The cortical zone, in the center - Incorrect, as the testicle structure does not have a defined cortical zone. D: The medullar zone, at the periphery - Incorrect, as the medullary zone is not at the periphery but rather towards the center of the testicle.

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).