Which of the following is not involved in parturition.

Correct Answer: C

Rationale: Step-by-step rationale: 1. Parturition is the process of giving birth. 2. Luteinising hormone (LH) is primarily involved in the menstrual cycle and ovulation, not parturition. 3. Prostaglandins and oxytocin play crucial roles in initiating and sustaining labor. 4. An increase in uterine oxytocin receptors is necessary for effective uterine contractions during parturition. 5. Therefore, an increase in luteinising hormone secretion is not involved in parturition. Summary of incorrect choices: A: Incorrect - an increase in prostaglandin secretion is involved in parturition. B: Incorrect - an increase in uterine oxytocin receptors is necessary for parturition. D: Incorrect - an increase in oxytocin secretion is crucial for initiating labor.

Correct Answer: B

Rationale: The correct answer is B: perineorrhaphy. "Perineorrhaphy" refers to the surgical suturing of the perineum. The term is derived from "perineum" (the area between the anus and the genitalia) and "rrhaphy" (meaning suture). A: cervicography - This term refers to a diagnostic procedure involving imaging of the cervix, not related to suturing the perineum. C: cervicorrhapy - This term does not exist in medical terminology and is not related to suturing the perineum. D: cervicorrhexis - This term refers to the tearing of the cervix, not the suturing of the perineum. In summary, perineorrhaphy is the correct term as it specifically refers to suturing the perineum, while the other choices are unrelated to this procedure.

Correct Answer: A

Rationale: The correct answer is A because the arterial vascularization of the testicle is indeed provided by the gonadal artery, which is a branch off the abdominal aorta. This is anatomically accurate as the gonadal artery supplies blood to the testicles. Choice B is incorrect because the venous drainage of the testicle is to the testicular vein, which drains into the inferior vena cava, not the internal iliac vein as stated in option B. Choice C is incorrect because the testicular artery, not the internal iliac artery, is responsible for the arterial supply to the testicle. Choice D is incorrect because the venous drainage of the testicle is not tributary to the inferior vena cava; instead, it drains into the left renal vein.

Correct Answer: A

Rationale: Correct Answer: A Rationale: Spermatogenesis is a complex process involving several stages such as mitosis, meiosis, and maturation. It starts with the division of spermatogonia through mitosis, followed by meiosis I and II to form haploid spermatids. These spermatids then undergo maturation to become spermatozoa. Therefore, spermatogenesis occurs in several stages, making choice A the correct answer. Summary of Incorrect Choices: B: While spermatogenesis does involve meiosis, it includes both meiosis I and II, not just meiosis I. C: Spermatogenesis includes both meiosis I and II, not just meiosis II. D: Spermatogenesis is primarily regulated by hormones such as testosterone and LH, not FSH.

Correct Answer: D

Rationale: The correct answer is D because the ovary is not located in the right flank; it is located in the lower abdomen. A: The ovary is a pair organ, as there are two ovaries in the female reproductive system. B: The ovary is a gland with mixed roles, producing hormones and releasing eggs. C: The ovary is oval-shaped, which is anatomically correct. Therefore, choice D is incorrect as the ovary is not located in the right flank.