Y1S2 003 I Pharmacology Autonomic Nervous System: Functions and Regulation
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Questions and Answers

What is the effect of low dose epinephrine on blood pressure?

  • Decrease (correct)
  • Increase
  • First increase then decrease
  • Remain unchanged

Which receptor is responsible for the contraction of sphincters in the GIT?

  • α1 (correct)
  • β1
  • β2
  • α2

What is the effect of epinephrine on the uterus in pregnant women?

  • Variable response
  • No effect
  • Contraction
  • Relaxation (correct)

Why does high dose epinephrine cause a greater increase in blood pressure than low dose epinephrine?

<p>Because of its effect on α1 receptors (B)</p> Signup and view all the answers

What is the effect of epinephrine on glycogenolysis?

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

What is one of the clinical uses of epinephrine?

<p>Treatment of acute asthma (A)</p> Signup and view all the answers

What is the primary function of the autonomic nervous system in relation to the heart?

<p>Regulation of heart rate and force of contraction (B)</p> Signup and view all the answers

What is the response of the sympathetic nervous system often referred to as?

<p>Fight, fright or flight response (D)</p> Signup and view all the answers

Which of the following receptors is mainly found on the heart, kidneys, and salivary glands?

<p>β1 (D)</p> Signup and view all the answers

What is the function of Epinephrine/Adrenaline in the sympathetic nervous system?

<p>A non-selective adrenergic (α and β) agonist (B)</p> Signup and view all the answers

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

<p>Decreasing heart rate and blood pressure (D)</p> Signup and view all the answers

What is the term for the amount of blood pumped by the heart per minute?

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

What is the effect of Norepinephrine/Noradrenaline on alpha receptors on blood vessels?

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

What is the effect of Norepinephrine/Noradrenaline on beta 2 receptors?

<p>No significant effect (D)</p> Signup and view all the answers

What is the primary effect of Norepinephrine/Noradrenaline on heart rate?

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

What is the effect of Norepinephrine/Noradrenaline on blood pressure?

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

What is the therapeutic use of Norepinephrine/Noradrenaline?

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

What is the mechanism of inactivation of Epinephrine/Adrenaline?

<p>Rapidly inactivated by MAO and COMT (D)</p> Signup and view all the answers

What is the effect of Propranolol on heart rate?

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

What is the therapeutic use of Propranolol?

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

What is the type of receptor that Acetylcholine binds to in the heart?

<p>M2 (A)</p> Signup and view all the answers

What is the effect of the parasympathetic nervous system on blood vessels?

<p>No effect (D)</p> Signup and view all the answers

What is the effect of M3 receptor stimulation on blood vessels?

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

What is the therapeutic use of acetylcholine in ophthalmic surgery?

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

What is the effect of atropine on the heart rate?

<p>Increase in heart rate (D)</p> Signup and view all the answers

What is the duration of action of acetylcholine?

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

What is the effect of acetylcholine on smooth muscles?

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

What is the effect of atropine on the actions of acetylcholine?

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

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