Which of the followings is an erectile organ responsible for sexual sensations?

Correct Answer: A

Rationale: Rationale: The correct answer is A: clitoris. The clitoris is an erectile organ responsible for sexual sensations due to its high concentration of nerve endings. It becomes engorged with blood during arousal, enhancing sensitivity. Ovary (B), Cervix (C), and Breast (D) are not erectile organs and do not directly contribute to sexual sensations. Ovary produces eggs, Cervix is part of the reproductive system, and Breast is a secondary sexual characteristic involved in breastfeeding.

Correct Answer: C

Rationale: The correct answer is C because the straight tubules open into the rete testis, which is a network of tubules located at the hilum of the testis. This is where sperm produced in the seminiferous tubules are collected and transported to the epididymis for maturation. The other choices are incorrect because A is not accurate as straight tubules are not located inside the lobules, B is incorrect as straight tubules are a separate structure from the convoluted seminiferous tubules, and D is inaccurate as straight tubules do not open directly into the epididymal duct.

Correct Answer: A

Rationale: Step-by-step rationale: 1. The corpus spongiosum surrounds the urethra in the male external genital organ, aiding in the passage of urine and semen. 2. This structure is crucial for maintaining proper urinary and reproductive functions. 3. The other choices are incorrect because: - Choice B is vague and does not specifically relate to the male genital organ. - Choice C refers to the corpora cavernosa, which are erectile tissue in the penis, not the urethra. - Choice D describes the root of the penis but does not specifically relate to the corpus spongiosum.

Correct Answer: A

Rationale: The correct answer is A: ovary. The female reproductive system includes the ovaries, which are responsible for producing eggs and hormones like estrogen and progesterone. The Fallopian tubes are passageways for eggs to travel from the ovaries to the uterus, not a part of the system itself. The vagina is the birth canal and where sperm enters during intercourse, but it is not a reproductive organ. The vulva includes external genitalia like the labia and clitoris, but it is not a reproductive structure. Therefore, the ovary is the only structure directly involved in the reproductive process.

Correct Answer: C

Rationale: The correct answer is C: the release of an oocyte. During the menstrual cycle, ovulation occurs where a mature egg (oocyte) is released from the ovary. This typically happens around the middle of the cycle in response to hormonal changes. This process is essential for fertilization and pregnancy to occur. A, B, and D are incorrect because: A: the maturation of a single secondary ovarian follicle - This occurs before ovulation, not during the menstrual cycle. B: the transformation of a primordial follicle into a secondary one - This is an earlier stage in follicle development, not a monthly occurrence. D: the release of a de Graaf follicle - The Graafian follicle is the mature follicle that releases the oocyte during ovulation, not a monthly event.