Choose the drug depressing erythrogenesis:

Correct Answer: A

Rationale: The correct answer is A: Radioactive phosphorus 32. Radioactive phosphorus 32 depresses erythrogenesis by inhibiting DNA synthesis in rapidly dividing cells like erythroblasts. Ferrous sulfate (B) is an iron supplement that promotes erythropoiesis. Molgramostim (C) is a granulocyte-macrophage colony-stimulating factor, which stimulates white blood cell production, not erythrogenesis. Folic acid (D) is essential for DNA synthesis and red blood cell production, so it would not depress erythrogenesis.

Correct Answer: A

Rationale: Step 1: Dipyridamole is a phosphodiesterase inhibitor that increases cyclic adenosine monophosphate (cAMP), leading to coronary vasodilation. Step 2: Myotropic agents act directly on vascular smooth muscle to cause vasodilation. Step 3: Dipyridamole's mechanism fits the definition of a myotropic coronary dilator. Summary: Atenolol (C) is a beta-blocker that works by blocking beta-adrenergic receptors. Validol (B) is a menthol-based preparation for angina relief. Alinidine (D) is a selective I1-agonist used for hypertension, not as a coronary dilator.

Correct Answer: A

Rationale: The correct answer is A because dopamine in high doses primarily acts on alpha-adrenoreceptors, leading to peripheral vasoconstriction. This is known as the "pressor effect" of dopamine. Dopamine does not directly act on its own receptors (choice B) for vasodilation. While dopamine can also stimulate beta-1 adrenoreceptors (choice C) to enhance cardiac output, this is not the main effect in high doses. Choice D is incorrect because dopamine primarily influences alpha-adrenoreceptors, not all of the listed receptors.

Correct Answer: D

Rationale: The correct answer is D because iodism refers to the adverse effects of excessive iodine intake, not a situation where iodide preparations are used. A: Iodide is used in thyroid disorders to regulate thyroid hormone production. B: Iodide can be used in granulomatous lesions like Syphilis due to its anti-inflammatory properties. C: Iodide is used as an antiseptic due to its antimicrobial properties. In summary, iodide preparations are used in various medical conditions except for causing iodism.

Correct Answer: D

Rationale: Step 1: Glucocorticoids are a class of hormonal steroids. Step 2: They have important effects on intermediary metabolism, cardiovascular function, growth, and immunity. Step 3: Glucocorticoids also have salt-retaining activity. Step 4: Some glucocorticoids may exhibit androgenic or estrogenic activity. Therefore, the correct answer is D, as all the statements in choices A, B, and C are true regarding the characteristics of glucocorticoids. Choices A, B, and C are incorrect because glucocorticoids are not limited to just one specific function or activity.