Autonomic Drugs: Sympathetic and Parasympathetic Nervous System

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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?

M2 and M3 Signup and view all the answers

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

Coronary artery spasm Signup and view all the answers

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

Miotic effect Signup and view all the answers

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

β2 Signup and view all the answers

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

Increase due to α1 receptor activation Signup and view all the answers

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

α2 Signup and view all the answers

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

β2 Signup and view all the answers

Which clinical condition is NOT a typical use for epinephrine?

Type 2 diabetes management Signup and view all the answers

Which adverse effect is NOT typically associated with epinephrine use?

Nasal congestion Signup and view all the answers

What is the primary effect of Norepinephrine on blood vessels?

Vasoconstriction Signup and view all the answers

What is the effect of Propranolol on coronary blood flow?

Decreases coronary blood flow Signup and view all the answers

Which neurotransmitter is released by the Parasympathetic Nervous System?

Acetylcholine Signup and view all the answers

Which type of receptors are primarily found on the heart?

M2 receptors Signup and view all the answers

What is the effect of Norepinephrine on blood pressure?

Increases blood pressure Signup and view all the answers

What is the therapeutic use of Propranolol?

Treating anxiety and arrhythmias Signup and view all the answers

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

Decreases secretion of renin Signup and view all the answers

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

All of the above Signup and view all the answers

What is the effect of Norepinephrine on the stroke volume?

Increases stroke volume Signup and view all the answers

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

Decreases heart rate Signup and view all the answers

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

Norepinephrine (NE) Signup and view all the answers

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

Decrease heart rate and blood pressure Signup and view all the answers

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

β1 Signup and view all the answers

What is the effect of epinephrine on blood vessels?

Both constriction and dilation of blood vessels Signup and view all the answers

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

Regulation of body temperature Signup and view all the answers

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

Adrenal medulla Signup and view all the answers