Bemegride:

Correct Answer: C

Rationale: The correct answer is C because Bemegride has both central and reflector effects. It acts centrally by stimulating the medullar respiratory center (not inhibiting it as in choice A), and peripherally by stimulating chemoreceptors in the carotid sinus zone (not acting as a spinal analeptic as in choice D). Therefore, choice C accurately describes the dual mechanism of action of Bemegride, making it the correct choice.

Correct Answer: C

Rationale: Step 1: Identify the antitussive agents that have a peripheral effect. Step 2: Understand that antitussive agents with a peripheral effect act outside the central nervous system. Step 3: Recognize that Libexine is the only antitussive agent among the choices that exerts its effect peripherally. Step 4: Codeine and Tusuprex primarily act centrally, not peripherally. Step 5: Glaucine hydrochloride is a smooth muscle relaxant and not typically classified as an antitussive agent with a peripheral effect.

Correct Answer: D

Rationale: Step-by-step rationale: 1. Cholosas is a bile stimulant of vegetable origin, containing bile salts. 2. Bile salts in Cholosas promote the production of bile in the liver, aiding in digestion. 3. Oxaphenamide and Papaverine are not bile stimulants. 4. Cholenzyme is an enzyme supplement, not a bile stimulant. In summary, Cholosas is the correct answer as it directly stimulates bile production, while the other choices are not related to bile production.

Correct Answer: D

Rationale: The correct answer is D because glycosides intoxication can lead to a range of cardiac manifestations, including atrioventricular junctional rhythm, second-degree atrioventricular blockade, and ventricular tachycardia. These effects are due to the toxic effects of glycosides on the heart's electrical conduction system. Atrioventricular junctional rhythm occurs when the impulse originates in the atrioventricular node, leading to a slower heart rate. Second-degree atrioventricular blockade involves a delay or interruption in the electrical signals between the atria and ventricles. Ventricular tachycardia is a rapid heart rhythm originating in the ventricles. Therefore, all of the above options are correct manifestations of glycosides intoxication.

Correct Answer: A

Rationale: Rationale: A: Incorrect. Calcium channel blockers do not release nitric oxide. They mainly block calcium entry into cells. B: Correct. L-type calcium channels are the main target of calcium channel blockers. C: Correct. Calcium channel blockers decrease oxygen demand and increase oxygen delivery in angina. D: Correct. Calcium channel blockers reduce calcium entry, leading to relaxation in smooth muscle and decreased contractility in cardiac muscle. Therefore, choice A is incorrect because calcium channel blockers do not release nitric oxide.