Chapter-4 Drugs acting on Autonomic Nervous System 1. General Consideration Short Questions & Answers: 01. Antidote in organophosphate poisoning (a) Physostigmine (b) Pyridostigmine (c) Pralidoxime (d) Neostigmine 02. Which of the following direct-acting cholinomimetics is mainly muscarinic in action (a) Bethanechol (b) Carbachol (c) Acetylcholine (d ) All of the above 03. All of the following are action of muscarinic antagonists except (a) Decreases gastric secretion (b) Prolongs A-v conduction (c) Decreases tracheobronchial secretions (d) Causes contraction of radial muscle of iris 04. Which of the following cranical nerve does not contain parasympathetic motor (GVE) fibers (a) II (b) VI (c) IX (d) X 05. Acetylcholine is not used in clinical practice because (a) It is very toxic (b) The doses required are very high (c) It is very rapidly hydrolyzed (d) It is very costly 06. Parasympathomimetic drugs cause (a) Bronchodilation (b) Mydriasis (c) Bradyca