Beta1 receptor stimulation includes all of the following effects EXCEPT:

Correct Answer: B

Rationale: Beta1 receptor stimulation primarily affects the heart. Stimulation leads to increased contractility, tachycardia, and increased conduction velocity in the atrioventricular node. However, bronchodilation is not a direct effect of beta1 receptor stimulation. Beta2 receptors are responsible for bronchodilation, not beta1 receptors. Therefore, choice B is incorrect. Choices A, C, and D are all correct effects of beta1 receptor stimulation.

Correct Answer: D

Rationale: The correct answer is D because all three drugs listed (Flurazepam, Zaleplon, Triazolam) do not significantly alter hepatic drug-metabolizing enzyme activity. These drugs primarily act on GABA receptors in the central nervous system, rather than affecting hepatic enzymes. Therefore, they do not interfere with the metabolism of other drugs in the liver. Choices A, B, and C are incorrect because all of them are hypnotic drugs that do not alter hepatic drug-metabolizing enzyme activity.

Correct Answer: A

Rationale: The correct answer is A. Barbiturates are used in status epilepticus due to their ability to significantly decrease oxygen utilization by the brain, which helps protect against cerebral edema and ischemia. This is crucial in managing the acute phase of seizures in infants and children. Option B is incorrect because barbiturates have a short onset but prolonged duration of action, making them unsuitable for rapid management. Option C is incorrect as barbiturates can disrupt normal sleep architecture due to their sedative effects. Therefore, the correct choice is A for its specific neuroprotective properties in the context of status epilepticus.

Correct Answer: C

Rationale: Rationale: 1. Bromocriptine is a D2 receptor agonist. 2. Stimulation of D2 receptors helps alleviate Parkinson's symptoms. 3. Sinemet and Levodopa are dopamine precursors but not D2 agonists. 4. Selegiline is a monoamine oxidase inhibitor, not a D2 agonist. In summary, Bromocriptine directly activates D2 receptors, making it the correct choice for antiparkinsonian activity.

Correct Answer: D

Rationale: Alcohol can cause CNS depression by slowing down brain function. It also leads to vasodilatation, widening blood vessels and lowering blood pressure. Additionally, alcohol can induce hypoglycemia by inhibiting glucose production in the liver. Therefore, all choices are correct, making option D the correct answer. Other choices are incorrect because they individually do not encompass all the effects of alcohol consumption.