Which hormone inhibits the release of FSH from the pituitary gland?

Correct Answer: A

Rationale: Rationale: 1. Inhibin is produced by the ovaries and testes in response to FSH stimulation. 2. Inhibin acts as a negative feedback signal to inhibit further FSH release. 3. This mechanism helps regulate the levels of FSH in the body. Summary: - Relaxin is a hormone involved in pregnancy and does not directly inhibit FSH release. - GnRH stimulates FSH release rather than inhibiting it. - hCG is produced during pregnancy and does not have a direct role in inhibiting FSH secretion.

Correct Answer: D

Rationale: The correct answer is D (Both a & c) because benign tumors originating in the myometrium are typically either fibroids (choice A) or leiomyomas (choice C), which are essentially the same thing. Fibroids and leiomyomas are both non-cancerous growths arising from smooth muscle cells in the myometrium. Rhabdomyoma (choice B) is a benign tumor arising from striated muscle cells, not smooth muscle cells like fibroids and leiomyomas. So, choices A, B, and C are incorrect because only fibroids and leiomyomas specifically originate in the myometrium.

Correct Answer: A

Rationale: The correct answer is A: Vas deferens. Sterilization in males is typically done through a procedure called a vasectomy, where a small portion of the vas deferens is excised to prevent the transportation of sperm from the testicles to the urethra. The vas deferens is the duct that carries sperm from the epididymis to the ejaculatory duct. Excising a portion of the ejaculatory duct, epididymis, or seminal vesicles would not prevent the transportation of sperm, making choices B, C, and D incorrect.

Correct Answer: B

Rationale: The correct answer is B: Greenstick fracture. This type of fracture occurs in children due to their bones being softer and more flexible. In a greenstick fracture, the bone is partially broken, breaking on one surface while bending on the other. This happens because children's bones have more collagen and less mineral content, making them more likely to bend rather than break completely. A: Colles fracture is a specific type of wrist fracture where the distal radius is broken. C: Impacted fracture occurs when the broken ends of the bone are driven into each other. D: Compression fracture involves the bone being crushed or compressed, usually seen in the spine.

Correct Answer: C

Rationale: The correct answer is C: Coccyx. The tailbone is also known as the coccyx, which is a small triangular bone at the base of the spine. It consists of 3-5 fused vertebrae. The lumbar vertebra (A) is part of the lower back, the sacrum (B) is a large triangular bone at the base of the spine, and the cauda equina (D) is a bundle of nerves at the lower end of the spinal cord. The coccyx specifically refers to the tailbone, making it the correct choice in this context.