Which of the following effects can be prevented by administering atropine?

Show Answers

Reduction in blood pressure induced by hexamethoniumElevation of blood pressure triggered by nicotineRapid heartbeat resulting from physical exertionIncrease in heart rate due to acetylcholine injectionNone of the above

Explanation

Atropine blocks muscarinic receptors and can counteract the blood pressure drop caused by hexamethonium, a ganglionic blocker. However, it does not prevent blood pressure rises from nicotine, tachycardia from exercise, or acetylcholine-induced heart rate changes.