Tick praziquantel mechanism of action:

Correct Answer: C

Rationale: The correct answer is C because praziquantel increases cell membrane permeability for calcium, leading to paralysis, dislodgement, and death of helminthes. This mechanism disrupts the helminth's ability to maintain membrane integrity and homeostasis, ultimately causing their demise. A is incorrect as praziquantel does not block acetylcholine transmission. B is incorrect because praziquantel does not inhibit microtubule synthesis or impair glucose uptake. D is incorrect as praziquantel does not inhibit oxidative phosphorylation in helminthes.

Correct Answer: C

Rationale: Step-by-step rationale for why choice C (Adenosine) is correct: 1. Adenosine is used for supraventricular tachycardia due to its ability to slow conduction through the AV node. 2. Mexiletine and Lidocaine are sodium channel blockers used for ventricular arrhythmias, not supraventricular tachycardia. 3. Amiodarone is a broad-spectrum antiarrhythmic used for various types of arrhythmias, not specific to supraventricular tachycardia. Summary: Adenosine is the correct answer because of its specific mechanism of action in treating supraventricular tachycardia. Mexiletine, Lidocaine, and Amiodarone are used for different types of arrhythmias, making them incorrect choices.

Correct Answer: C

Rationale: The correct answer is C: Adenosine. Adenosine is commonly used for cardioversion of supraventricular tachycardias like atrial flutter. It works by blocking the AV node transiently, allowing the sinus node to regain control of the heart rhythm. Mexiletine (A) and Lidocaine (B) are primarily used for ventricular arrhythmias, not atrial flutter. Amiodarone (D) is often used for atrial fibrillation, not specifically atrial flutter.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.