Which of the following hormones is produced by the thyroid gland?

Correct Answer: C

Rationale: The correct answer is C: Triiodothyronine. The thyroid gland produces triiodothyronine (T3) along with its precursor hormone, thyroxine (T4), which are essential for regulating metabolism in the body. T3 is the active form of thyroid hormone that influences various physiological processes. Thyroid-stimulating hormone (TSH) is produced by the pituitary gland to stimulate the thyroid gland to produce T3 and T4, making choice A incorrect. Thyrotropin-releasing hormone (TRH) is produced by the hypothalamus to stimulate the pituitary gland to produce TSH, making choice B incorrect. Thyroglobulin is a protein synthesized by the thyroid gland to store thyroid hormones, not a hormone itself, making choice D incorrect.

Correct Answer: A

Rationale: Step 1: Thromboxane A2 (TXA2) is a potent vasoconstrictor and platelet aggregator. Step 2: Sulotroban is a specific TXA2 receptor antagonist, blocking its effects. Step 3: Zileuton inhibits 5-lipoxygenase, not directly related to TXA2 receptors. Step 4: Zafirleukast is a leukotriene receptor antagonist, not targeting TXA2 receptors. Step 5: Diclofenac is a non-selective NSAID, not a TXA2 receptor antagonist. Summary: Sulotroban is the correct choice as it directly blocks TXA2 receptors, while the other options target different pathways.

Correct Answer: C

Rationale: Interferon alpha is indicated in Kaposi's sarcoma due to its antiviral and anti-tumor properties. It helps in controlling the progression of the disease caused by human herpesvirus 8. Other options (A) Rh sensitization is managed by Rh immunoglobulin, (B) Rheumatoid arthritis is treated with disease-modifying anti-rheumatic drugs, and (D) Chronic granulomatous disease is managed with antibiotics and interferon-gamma.

Correct Answer: B

Rationale: Step 1: Taurine is a vitamin-like compound as it is an amino acid that has functions similar to vitamins in the body. Step 2: Ascorbic acid (Vitamin C) is a vitamin, not a vitamin-like compound. Step 3: Thiamine (Vitamin B1) and Riboflavin (Vitamin B2) are both vitamins, not vitamin-like compounds. Summary: Taurine is the correct answer as it is an amino acid with functions similar to vitamins, while the other choices are known vitamins.

Correct Answer: A

Rationale: Step-by-step rationale: 1. HMG-CoA reductase inhibitors like statins can cause muscle breakdown. 2. Cyclosporine is known to increase the risk of muscle breakdown when used with statins. 3. Thus, the statement that HMG-CoA reductase inhibiting drugs can cause muscle breakdown, especially when used with cyclosporine, is TRUE. Summary: Choice A is correct because it aligns with the known pharmacological interactions between HMG-CoA reductase inhibitors and cyclosporine. Choices B, C, and D are incorrect as they do not accurately reflect the specific relationship between these drugs and muscle breakdown.