A highly selective serotonine reuptake inhibitor is:

Correct Answer: D

Rationale: The correct answer is D: All of the above. Highly selective serotonin reuptake inhibitors (SSRIs) target the reuptake of serotonin specifically. Sertraline, paroxetine, and fluoxetine are all SSRIs. They do not significantly affect other neurotransmitters, making them highly selective. Therefore, all three choices are correct as they are all examples of highly selective serotonin reuptake inhibitors.

Correct Answer: C

Rationale: Certainly! Nitrous oxide is the correct answer as it is the only gas anesthetic listed. It is commonly used in dentistry and minor surgeries due to its anesthetic properties. Halothane, isoflurane, and desflurane are all liquid inhalants, not gas anesthetics. Nitrous oxide stands out as the only gas option among the choices.

Correct Answer: D

Rationale: The correct answer is D: Carbonate mineral waters. Carbonate mineral waters do not intensify the secretion of gastric glands. Pepsin is an enzyme that aids in digestion, Gastrin is a hormone that stimulates gastric acid secretion, and Histamine is a neurotransmitter that also stimulates gastric acid secretion. Carbonate mineral waters do not have the same effect on gastric glands as the other agents listed. Therefore, the correct answer is D.

Correct Answer: D

Rationale: The correct answer is D: Protamine sulfate. Protamine sulfate is an antagonist of heparin because it binds to heparin molecules, forming a stable complex that neutralizes the anticoagulant effects of heparin. This interaction helps to reverse the effects of heparin in cases of heparin overdose or when immediate cessation of anticoagulation is required. A: Aspirin is an antiplatelet agent that inhibits platelet aggregation by irreversibly inhibiting cyclooxygenase. It is not an antagonist of heparin. B: Dicumarol is a vitamin K antagonist that inhibits the synthesis of vitamin K-dependent clotting factors. It is not an antagonist of heparin. C: Dalteparin is a low-molecular-weight heparin that acts as an anticoagulant by inhibiting the activity of factor Xa. It is not an antagonist of heparin. In summary, Protamine sulfate

Correct Answer: A

Rationale: Step-by-step rationale for why A (Digoxin) is the correct answer: 1. Digoxin is a cardiac glycoside that slows conduction through the AV node, making it effective in controlling supraventricular tachycardias. 2. It increases the refractory period of the AV node, reducing the heart rate. 3. Digoxin is not a vasopressor like Dobutamine or Dopamine, which are used for different indications. 4. Amrinone is a phosphodiesterase inhibitor, primarily used in heart failure, not specifically for supraventricular tachycardias.