Autonomic Drugs: Sympathetic and Parasympathetic Nervous System
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Questions and Answers

What is the main effect of M3 receptor activation on blood vessels?

  • Vasoconstriction
  • Increase in blood pressure
  • Increase in heart rate
  • Vasodilation (correct)

    • Which receptor mediates the decrease in heart rate and force of cardiac contraction induced by acetylcholine?

  • Nicotinic
  • M2 (correct)
  • M1
  • M3

    • What effect does atropine have on the actions of acetylcholine at muscarinic receptors in the heart?

  • Causes vasodilation
  • Increases heart rate (correct)
  • Reduces blood pressure
  • Induces coronary artery spasm

    • Which type of receptors are affected by atropine administration?

    <p>M2 and M3</p> Signup and view all the answers

    What is the main effect of injecting acetylcholine into the coronary artery?

    <p>Coronary artery spasm</p> Signup and view all the answers

    Which of the following is a therapeutic use of acetylcholine in ophthalmic surgery?

    <p>Miotic effect</p> Signup and view all the answers

    Which receptor is primarily responsible for the vasodilation effect of low-dose epinephrine?

    <p>β2</p> Signup and view all the answers

    What is the primary effect of high-dose epinephrine on blood pressure?

    <p>Increase due to α1 receptor activation</p> Signup and view all the answers

    Which receptor is primarily responsible for the reflex decrease in heart rate seen with high-dose epinephrine?

    <p>α2</p> Signup and view all the answers

    Which receptor is primarily responsible for the relaxation of bronchial muscles seen with epinephrine?

    <p>β2</p> Signup and view all the answers

    Which clinical condition is NOT a typical use for epinephrine?

    <p>Type 2 diabetes management</p> Signup and view all the answers

    Which adverse effect is NOT typically associated with epinephrine use?

    <p>Nasal congestion</p> Signup and view all the answers

    What is the primary effect of Norepinephrine on blood vessels?

    <p>Vasoconstriction</p> Signup and view all the answers

    What is the effect of Propranolol on coronary blood flow?

    <p>Decreases coronary blood flow</p> Signup and view all the answers

    Which neurotransmitter is released by the Parasympathetic Nervous System?

    <p>Acetylcholine</p> Signup and view all the answers

    Which type of receptors are primarily found on the heart?

    <p>M2 receptors</p> Signup and view all the answers

    What is the effect of Norepinephrine on blood pressure?

    <p>Increases blood pressure</p> Signup and view all the answers

    What is the therapeutic use of Propranolol?

    <p>Treating anxiety and arrhythmias</p> Signup and view all the answers

    What is the effect of Propranolol on the secretion of renin?

    <p>Decreases secretion of renin</p> Signup and view all the answers

    Which part of the heart is innervated by the Parasympathetic Nervous System?

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

    What is the effect of Norepinephrine on the stroke volume?

    <p>Increases stroke volume</p> Signup and view all the answers

    What is the effect of Propranolol on the heart rate at rest?

    <p>Decreases heart rate</p> Signup and view all the answers

    Which of the following neurotransmitters is released from postganglionic sympathetic fibers?

    <p>Norepinephrine (NE)</p> Signup and view all the answers

    What is the main function of the parasympathetic nervous system in controlling heart rate and blood pressure?

    <p>Decrease heart rate and blood pressure</p> Signup and view all the answers

    Which receptor subtype is mainly found on the heart, kidneys, and salivary glands?

    <p>β1</p> Signup and view all the answers

    What is the effect of epinephrine on blood vessels?

    <p>Both constriction and dilation of blood vessels</p> Signup and view all the answers

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

    <p>Regulation of body temperature</p> Signup and view all the answers

    What is the primary target of the sympathetic nervous system in the 'fight, fright or flight' response?

    <p>Adrenal medulla</p> Signup and view all the answers

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