Indicate the CNS stimulants,which mitigate conditions of weakness or lack of tone within the entire organism or in particular organs?

Correct Answer: C

Rationale: The correct answer is C: General tonics. General tonics are CNS stimulants that help mitigate conditions of weakness or lack of tone in the entire organism or specific organs by providing a non-specific boost in energy and vitality. Psychostimulants (A) primarily target mental alertness and focus, not overall weakness. Analeptics (B) are CNS stimulants that specifically stimulate the respiratory centers and are not general tonics. Antidepressants (D) are used to treat mood disorders and do not directly address physical weakness or lack of tone.

Correct Answer: A

Rationale: The correct answer is A: Sevoflurane. Sevoflurane is the inhaled anesthetic that increases cerebral blood flow the least due to its minimal effect on cerebral vasodilation. Sevoflurane has a lower blood-gas partition coefficient compared to the other choices, resulting in faster onset and offset of action. This rapid clearance from the blood reduces its impact on cerebral blood flow. In contrast, Nitrous oxide (Choice B) is a potent cerebral vasodilator, Isoflurane (Choice C) and Desflurane (Choice D) also have higher blood-gas partition coefficients leading to more significant effects on cerebral blood flow compared to Sevoflurane.

Correct Answer: A

Rationale: The correct answer is A: TRUE. Antacids, such as calcium carbonate or magnesium hydroxide, are weak bases that neutralize stomach acid (hydrochloric acid) by forming salt and water. This reaction helps to relieve symptoms of heartburn and indigestion. Option B is incorrect as antacids indeed react with gastric acid. Option C is incorrect as not all choices are correct, and Option D is incorrect as at least one of the choices is correct.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Ticlopidine is a thienopyridine derivative that inhibits ADP-induced platelet aggregation. 2. By inhibiting the binding of ADP to its platelet receptor, it prevents platelet activation and aggregation. 3. This mechanism of action makes ticlopidine an effective antiplatelet medication for preventing clot formation. 4. Therefore, the statement that ticlopidine is an inhibitor of ADP-induced platelet aggregation is TRUE. Summary of other choices: - Choice B (FALSE): This is incorrect as ticlopidine is indeed an inhibitor of ADP-induced platelet aggregation. - Choice C (All): This is incorrect as ticlopidine is not classified as affecting all types of platelet aggregation. - Choice D (None of the above): This is incorrect as the correct answer is A, making this choice invalid.

Correct Answer: B

Rationale: The correct answer is B: Verapamil. Verapamil is a calcium channel blocker that slows conduction through the AV node, making it effective in terminating supraventricular tachycardias. Nifedipine, choice A, is also a calcium channel blocker but is not typically used intravenously for this purpose. Choice C is incorrect because only Verapamil is specifically indicated for terminating supraventricular tachycardias. Choice D is incorrect as Verapamil is the correct drug for this scenario.