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Autonomic Drugs: Sympathetic and Parasympathetic Nervous System

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28 Questions

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

Vasodilation

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

M2

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

Increases heart rate

Which type of receptors are affected by atropine administration?

M2 and M3

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

Coronary artery spasm

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

Miotic effect

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

β2

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

Increase due to α1 receptor activation

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

α2

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

β2

Which clinical condition is NOT a typical use for epinephrine?

Type 2 diabetes management

Which adverse effect is NOT typically associated with epinephrine use?

Nasal congestion

What is the primary effect of Norepinephrine on blood vessels?

Vasoconstriction

What is the effect of Propranolol on coronary blood flow?

Decreases coronary blood flow

Which neurotransmitter is released by the Parasympathetic Nervous System?

Acetylcholine

Which type of receptors are primarily found on the heart?

M2 receptors

What is the effect of Norepinephrine on blood pressure?

Increases blood pressure

What is the therapeutic use of Propranolol?

Treating anxiety and arrhythmias

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

Decreases secretion of renin

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

All of the above

What is the effect of Norepinephrine on the stroke volume?

Increases stroke volume

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

Decreases heart rate

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

Norepinephrine (NE)

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

Decrease heart rate and blood pressure

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

β1

What is the effect of epinephrine on blood vessels?

Both constriction and dilation of blood vessels

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

Regulation of body temperature

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

Adrenal medulla

Explore the role of the sympathetic and parasympathetic nervous systems in controlling heart rate and blood pressure. Learn about the functions of the autonomic nervous system in regulating heart rate, force of contraction, blood vessel constriction, dilation, and more.

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