Ovulation occurs as a result of a surge of what hormone

Correct Answer: C

Rationale: The correct answer is C: luteinising hormone (LH). Ovulation is triggered by a surge of LH from the anterior pituitary gland, which causes the mature follicle to rupture and release the egg. Inhibin (A) inhibits FSH secretion, FSH (B) stimulates follicle development, and progesterone (D) is produced after ovulation to support the uterine lining. Therefore, the surge of LH is the key hormone that directly triggers ovulation.

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: zygote. After fertilization, when the sperm and egg unite, they form a zygote. This is the initial stage of a new organism's development. Implantation (A) occurs when the embryo attaches to the uterus. Embryo (C) is the term for the developing organism after the zygote stage. Breast (D) is not related to the fertilization process. In this context, zygote is the most appropriate term as it specifically refers to the newly formed cell after fertilization.

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.