Autonomic Nervous System Functions

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Questions and Answers

Which of the following is NOT a function of the autonomic nervous system?

  • Regulation of blood flow to various organs
  • Regulation of digestion
  • Skeletal muscle contraction (correct)
  • Control of cardiac output

What is the neurotransmitter released by preganglionic fibers in both the sympathetic and parasympathetic nervous systems?

  • Norepinephrine
  • Dopamine
  • Acetylcholine (correct)
  • Epinephrine

What type of receptors do muscarinic receptors belong to?

  • Metabotropic receptors (correct)
  • Ionotropic receptors
  • Adrenergic receptors
  • Nicotinic receptors

What is the function of the postganglionic fiber in the autonomic nervous system?

<p>Terminates in smooth cardiac muscle or a gland (C)</p> Signup and view all the answers

What is the term for the 'fight or flight' response?

<p>Sympathetic response (B)</p> Signup and view all the answers

What type of receptor is stimulated by acetylcholine in the autonomic nervous system?

<p>Nicotinic receptor (A)</p> Signup and view all the answers

What is the mechanism of action of succinylcholine on the nicotinic receptors?

<p>Acts like acetylcholine to depolarize the junction (B)</p> Signup and view all the answers

What is the antidote for neuromuscular blockers?

<p>Neostigmine (B)</p> Signup and view all the answers

What is the effect of succinylcholine on muscle contraction?

<p>Initially causes fasciculations, then flaccid paralysis (B)</p> Signup and view all the answers

What is the source of tubocurarine?

<p>All of the above (D)</p> Signup and view all the answers

What is a side effect of neuromuscular blockers?

<p>Bronchoconstriction (A)</p> Signup and view all the answers

What is the mechanism of action of dantrolene?

<p>Blocks Ca release to decrease muscle contraction (B)</p> Signup and view all the answers

What is the effect of pilocarpine on the ciliary muscle?

<p>Contraction (B)</p> Signup and view all the answers

Which of the following is a reversible inhibitor of acetylcholinesterase?

<p>Carbamates (D)</p> Signup and view all the answers

What is the site of absorption of nicotine?

<p>Skin (C)</p> Signup and view all the answers

Which of the following is an example of a chemical warfare agent?

<p>Tabun (B)</p> Signup and view all the answers

What is the side effect of organophosphates that can be remembered using the acronym DUMBBELS?

<p>Diarrhea, Urination, Miosis, Bronchospasm, Brachycardia, Emesis, Lacrimation, and Salivation (C)</p> Signup and view all the answers

What is the antidote for organophosphate poisoning that works by reactivating acetylcholinesterase?

<p>Pralidoxime (C)</p> Signup and view all the answers

What is the mechanism of action of homatropine?

<p>Inhibits release of IP3 and inhibits PDE (B)</p> Signup and view all the answers

What is the use of scopolamine transdermal patch?

<p>Prevention of motion sickness (B)</p> Signup and view all the answers

What is the indication for the use of trihexyphenidyl, benztropine, and biperiden?

<p>Parkinson's disease (D)</p> Signup and view all the answers

What is the advantage of using quaternary amine antimuscarinic drugs?

<p>More peripheral effect, less CNS effects (A)</p> Signup and view all the answers

What is the use of atropine or its analogs in ophthalmologic practice?

<p>To prevent synechia formation (B)</p> Signup and view all the answers

What is the use of tiotropium?

<p>To treat respiratory disorders, such as asthma (A)</p> Signup and view all the answers

What is the effect of alpha 1 receptors on blood pressure?

<p>Increase in blood pressure (C)</p> Signup and view all the answers

What is the effect of nicotine on ganglia?

<p>Initially stimulates and then blocks ganglia (C)</p> Signup and view all the answers

What is the effect of beta 2 receptors on the uterus?

<p>Relaxes the uterus (D)</p> Signup and view all the answers

What is the effect of hexamethonium on ganglia?

<p>Only blocks ganglia without prior stimulation (B)</p> Signup and view all the answers

What is the effect of trimethaphan on the body?

<p>Blocks ganglia without prior stimulation (C)</p> Signup and view all the answers

What is the effect of dantrolene on muscle cells?

<p>Blocks calcium release from the sarcoplasmic reticulum (D)</p> Signup and view all the answers

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