Atropine poisoning ✓ Passing Score: 50% 📝 Questions: 10 🎓 Practice Quiz Welcome! This is a practice quiz to test your knowledge. Please enter your details below to participate. Your results will be emailed to you upon completion. Your Information Name * Email * Start Quiz → Question 1 of 10 1 The mechanism by which atropine causes blurred vision and difficulty reading near objects is due to its blockade of which specific receptor type in the eye? * Dopamine receptors Beta-2 adrenergic receptors Alpha-1 adrenergic receptors Nicotinic receptors in the ganglion Muscarinic (M3) receptors in the iris sphincter and ciliary body 2 Which of the following foods or herbs is a primary natural source of potent anticholinergic alkaloids like atropine and scopolamine? * Monkshood (*Aconitum napellus*) Foxglove (*Digitalis purpurea*) Deadly Nightshade (*Atropa belladonna*) Castor bean (*Ricinus communis*) Opium poppy (*Papaver somniferum*) 3 In the context of anticholinergic poisoning, what does the term \\\\\\\"mydriasis\\\\\\\" refer to? * Constriction of the pupils Dilatation of the pupils Increased bronchial secretions Decreased body temperature Excessive salivation 4 A key finding on an electrocardiogram (ECG) in a patient with severe atropine poisoning would likely be: * Atrial fibrillation with slow ventricular response Prolonged PR interval with widening of the QRS complex Narrow complex tachycardia (SVT) ST-segment elevation indicative of acute ischemia Sinus bradycardia 5 A patient presenting with severe poisoning from a plant like *Atropa belladonna* is most likely to exhibit which combination of physical signs? * Tachycardia, dry skin, blurred vision, and flushed complexion Bradycardia, excessive salivation, and miosis (pinpoint pupils) Hypotension, diarrhea, and constricted pupils Hypothermia, muscle rigidity, and respiratory depression Hypertension, profuse sweating, and agitation 6 Why is the use of Physostigmine sometimes contraindicated or used with extreme caution in certain types of poisoning, even though it is the classic antidote? * It causes immediate and irreversible respiratory depression. It can precipitate seizures in patients with tricyclic antidepressant overdose. It primarily treats cholinergic, not anticholinergic, poisoning. It does not cross the blood-brain barrier effectively. It is highly toxic to the liver. 7 In managing mild to moderate anticholinergic poisoning where CNS symptoms are present but not severe, what is the primary supportive care measure? * Aggressive intravenous fluid resuscitation Continuous positive airway pressure (CPAP) Gastric lavage with activated charcoal Benzodiazepines for sedation and agitation control Aggressive cooling measures to combat hyperthermia 8 Which class of drugs is atropine primarily classified as, explaining its main mechanism of action in poisoning cases? * Sympathetic Ganglionic Stimulant Muscarinic Acetylcholine Receptor Antagonist Cholinesterase Inhibitor Serotonin Agonist Non-selective Beta-Blocker 9 What is the primary antidote used to reverse the life-threatening central nervous system (CNS) and cardiovascular effects of severe atropine/belladonna poisoning? * Naloxone Flumazenil Succinylcholine Physostigmine Pralidoxime (2-PAM) 10 Which of the following is a common CNS symptom associated with significant poisoning by plants containing scopolamine or atropine (like *Datura stramonium*)? * Auditory and visual hallucinations/delirium Severe muscle weakness (flaccid paralysis) Hypothermia Lethargy and unresponsiveness Profound sedation ← Previous Next → Submit Quiz ✓