Indicate the CNS stimulant which is used in pediatric medicine as it improves the communication with the child increases the ability to study and communication with peers improves school-performance?

Correct Answer: B

Rationale: The correct answer is B: Piracetam. Piracetam is a CNS stimulant known for improving cognitive function and memory, making it beneficial in pediatric medicine for enhancing learning abilities and school performance. It does not have the same potential for abuse or addiction as amphetamines (choice D). Meridil (choice A) and Bemegride (choice C) are not commonly used CNS stimulants in pediatric medicine and do not have the same cognitive-enhancing effects as Piracetam.

Correct Answer: B

Rationale: The correct answer is B: Tachycardia. Non-selective beta2-adrenomimics stimulate both beta1 and beta2 adrenergic receptors, leading to increased heart rate (tachycardia) due to beta1 receptor activation. A: Depression of the breathing centre is not a side effect of non-selective beta2-adrenomimics. C: Peripheral vasoconstriction is more commonly associated with alpha-adrenergic agonists, not beta2-adrenomimics. D: Dry mouth is not a common side effect of beta-adrenergic stimulation.

Correct Answer: B

Rationale: The correct answer is B: Folic acid. Folic acid is not a drug used for iron deficiency anemia; it is a B-vitamin essential for normal cellular function but not directly related to iron supplementation. Ferrous sulfate, ferrous gluconate, and ferrous fumarate are all iron salts commonly used to treat iron deficiency anemia by replenishing the body's iron stores. Folic acid, on the other hand, is primarily used to prevent neural tube defects in pregnancy and to treat certain types of anemia not related to iron deficiency.

Correct Answer: C

Rationale: Amrinone inhibits breakdown of cAMP by inhibiting phosphodiesterase enzyme in vascular smooth muscle. This leads to increased cAMP levels, causing vasodilation. Digoxin, dobutamine, and dopamine have no direct effect on cAMP breakdown in vascular smooth muscle. Digoxin increases intracellular calcium, dobutamine is a beta-adrenergic agonist, and dopamine acts on dopamine receptors.

Correct Answer: C

Rationale: Step 1: Beta-adrenoceptor-blocking drugs primarily work by blocking the beta-adrenergic receptors in the body. Step 2: By blocking these receptors, these drugs decrease heart rate, blood pressure, and contractility of the heart muscle. Step 3: These hemodynamic effects lead to decreased myocardial oxygen requirements at rest and during exercise, providing beneficial effects. Step 4: Choice C is correct as it accurately describes the main mechanism and beneficial effects of beta-adrenoceptor-blocking drugs. Step 5: Choices A, B, and D are incorrect as they do not accurately describe the primary mechanism or effects of beta-adrenoceptor-blocking drugs.