Bovine insulin is less antigenic than porcine. This consideration is:

Correct Answer: B

Rationale: The correct answer is B: FALSE. Bovine insulin is actually more antigenic than porcine insulin due to differences in amino acid sequences between bovines and humans, leading to a higher likelihood of immune response. Choice A is incorrect as it states that bovine insulin is less antigenic, which is false. Choices C and D do not apply since the correct answer is B.

Correct Answer: D

Rationale: The correct answer is D: Phenothiazines. Phenothiazines such as Diprazine and Promethazine are noted for their alpha-adrenoreceptor-blocking effect. This is due to their ability to block alpha-adrenergic receptors, leading to vasodilation and reduced blood pressure. Other choices (A, B, C) do not possess this specific alpha-adrenoreceptor-blocking effect and are not classified as histamine H1 antagonists known for this property. Therefore, the correct answer is D as phenothiazines exhibit the unique characteristic of alpha-adrenoreceptor-blocking effect among the given options.

Correct Answer: A

Rationale: The correct answer is A because Beri-beri is indeed a disease caused by a deficiency of thiamine, endemic in eastern and southern Asia, and characterized by neurological symptoms, cardiovascular abnormalities, and edema. This is the classic definition of Beri-beri. Choice B is incorrect because it describes angular stomatitis, which is caused by a deficiency of riboflavin, not thiamine as in Beri-beri. Choice C is incorrect because it describes cheilosis, a disorder of the lips associated with riboflavin deficiency, not thiamine deficiency as seen in Beri-beri. Therefore, the correct answer is A as it aligns with the classic presentation and etiology of Beri-beri.

Correct Answer: A

Rationale: The correct answer is A. HDL is a lipoprotein associated with a decreased risk of atherosclerosis and coronary artery disease due to its small amounts of cholesterol and triglycerides. It is also known as alpha-lipoprotein. Choice B is incorrect as it describes LDL, not HDL. Choice C is incorrect because high amounts of cholesterol are associated with LDL, not HDL. Choice D is incorrect as it describes chylomicrons, not HDL.

Correct Answer: B

Rationale: The correct answer is B: Sulfinpyrazone. This drug is an uricosuric agent that works by increasing the excretion of uric acid in the urine, thereby reducing serum uric acid levels. Allopurinol (A) is a xanthine oxidase inhibitor that decreases uric acid production. Colchicine (C) is used for gout but does not directly impact uric acid levels. Indomethacin (D) is a nonsteroidal anti-inflammatory drug that can help with gout symptoms but does not affect uric acid excretion.