Ovulation is initiated by

Correct Answer: D

Rationale: The correct answer is D: rising levels of luteinizing hormone. Luteinizing hormone surge triggers ovulation by stimulating the release of the mature egg from the ovary. This surge is a crucial event in the menstrual cycle. A: Follicle stimulating hormone is involved in follicular development, not ovulation. B: Progesterone levels rise after ovulation, not before. C: Oestrogen levels actually rise before ovulation to trigger the LH surge, so a drop in oestrogen levels would not initiate ovulation.

Correct Answer: C

Rationale: The correct answer is C: prostate. The prostate gland secretes proteolytic enzymes such as prostate-specific antigen (PSA) to liquefy semen. This aids in sperm mobility and overall fertility. The other choices are incorrect because: A: bulbourethral gland secretes a clear fluid to lubricate the urethra during sexual arousal. B: urethra is a passageway for urine and semen but does not secrete proteolytic enzymes. D: testis produces sperm cells but does not secrete enzymes to liquefy semen.

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: cervicorrhaphy. "Cervico-" refers to the neck of the uterus, and "-rrhaphy" means suture. Therefore, cervicorrhaphy is the correct term for the procedure of suturing the neck of the uterus. A: Cervicography is a diagnostic imaging technique, not a procedure for suturing. B: Perineorrhaphy involves suturing the perineum, not the neck of the uterus. D: Cervicorrhexis refers to cutting or incising the neck of the uterus, not suturing it.

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.