The following agents are cardioselective beta1-adrenoceptor-blocking drugs labeled for use in angina, EXCEPT:

Correct Answer: D

Rationale: The correct answer is D: Propranolol. Propranolol is a non-selective beta-blocker, affecting both beta1 and beta2 receptors. In contrast, choices A, B, and C are cardioselective beta1-adrenoceptor-blocking drugs. Metoprolol, Talinolol, and Atenolol specifically target beta1 receptors in the heart, making them suitable for angina treatment. Propranolol, being non-selective, may lead to unwanted side effects related to beta2 receptor blockade, such as bronchoconstriction and peripheral vasoconstriction. Therefore, for angina patients, cardioselective beta1 blockers are preferred to minimize potential adverse effects.

Correct Answer: A

Rationale: The correct answer is A: Elderly patients (over 45 years). Radioiodines are suitable for elderly patients due to their slower metabolism, which allows for better uptake and retention of the radioiodine in the thyroid gland. This results in more effective treatment of conditions like hyperthyroidism or thyroid cancer. Pregnant women, nursing mothers, and younger patients should avoid radioiodine therapy due to potential risks to the fetus, infant, and developing thyroid gland, respectively. Overall, the slower metabolism in elderly patients makes them the most suitable candidates for radioiodine therapy.

Correct Answer: A

Rationale: Rationale: 1. During acute inflammation, the initial response is vasodilation and increased capillary permeability. 2. This leads to increased blood flow, redness, heat, and swelling at the site of injury. 3. The purpose is to deliver immune cells and proteins to the affected area to fight off pathogens. 4. Infiltration of leukocytes and phagocytic cells occurs after vasodilation in the exudation phase. 5. Tissue degeneration and fibrosis occur in the later stages of chronic inflammation, not in the acute phase. 6. Choice A is correct as it specifically describes the characteristics of the acute, transient phase of inflammation. Summary: - Choice A is correct as it accurately describes the characteristics of acute inflammation. - Choices B, C, and D are incorrect as they describe phases or processes that occur in chronic inflammation or are not specific to the acute phase.

Correct Answer: B

Rationale: The correct answer is B because H2 histamine receptor subtype is mainly distributed in gastric mucosa, cardiac muscle, mast cells, and brain. This receptor subtype plays a crucial role in gastric acid secretion and cardiovascular functions. Choice A is incorrect because smooth muscle and endothelium are primarily associated with H1 receptors, not H2 receptors. Choice C is incorrect because presynaptic H3 receptors are found in the brain and other neurons, not H2 receptors. Choice D is incorrect because H2 receptors are not distributed in smooth muscle, endothelium, or presynaptic regions as mentioned in choices A and C.

Correct Answer: B

Rationale: The correct answer is B: Tocopherol. Tocopherol is a fat-soluble vitamin, specifically referring to Vitamin E. Fat-soluble vitamins dissolve in fat and are stored in the body's fatty tissues, allowing for longer-term storage compared to water-soluble vitamins. Ascorbic acid (A) is Vitamin C, which is water-soluble. Thiamine (C) and Riboflavin (D) are both water-soluble B vitamins. Therefore, the correct choice is B because it is the only fat-soluble vitamin among the options provided.