Pharmacology: Alpha Receptors Agonists and Antagonists

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What is the primary neurotransmitter involved in the sympathetic nervous system?

GABA

Acetylcholine

Muscarine

Norepinephrine (NE) (correct)

What is the function of the parasympathetic nervous system?

Voluntary action

Rest and digest state (correct)

Fight or flight response

Involuntary action

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

Parasympathetic nervous system

Enteric neurons

Sympathetic nervous system

Somatic system (correct)

What is the primary function of alpha receptor agonists?

To stimulate the sympathetic nervous system Signup and view all the answers

What are the potential side effects of alpha receptor agonists?

Tachycardia and hypertension Signup and view all the answers

What is the clinical use of alpha receptor modulating agents?

To treat hypertension and anxiety disorders Signup and view all the answers

What is the main use of midodrine?

Postural hypotension Signup and view all the answers

Which of the following is a common adverse effect of alpha agonists?

Hypertension Signup and view all the answers

What is the therapeutic use of phenylephrine in PSVT?

To increase blood pressure Signup and view all the answers

What is the pharmacological action of selective alpha blockers?

Vasodilation Signup and view all the answers

What is the clinical application of oxymetazoline?

Nasal decongestant Signup and view all the answers

What is the adrenergic action of methoxamine?

Alpha 1 agonist Signup and view all the answers

What is the indication of epinephrine in bronchospasm?

To relax bronchial muscles Signup and view all the answers

What is the mechanism of action of amphetamine?

Enhances the release of norepinephrine Signup and view all the answers

What is the therapeutic use of pseudoephedrine?

To treat nasal and sinus congestion Signup and view all the answers

What is the effect of phenylephrine on blood pressure?

It increases blood pressure Signup and view all the answers

What is the use of phenylephrine in fundus examination?

To dilate pupils Signup and view all the answers

What is the mechanism of action of tricyclic antidepressants (TCAs) in relation to norepinephrine?

They block the reuptake of norepinephrine Signup and view all the answers