PNS Receptor Actions Flashcards by Zak Reneau | Brainscape

Q

What do M1, M4, and M5 receptors act on?

A

CNS

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Q

What is the rule of thumb for cholinergic receptors of the PNS?

A

M2 on the heart, M3 everywhere else

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Q

What does an M2 receptor do to the heart?

A

Decrease contraction/HR

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Q

What does an M2 receptor do to the lung*?

A

Contract bronchial SM

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Q

What does an M2 receptor do to the GI*?

A

Increase motility

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Q

What does an M3 receptor do to the eyes?

A

Miosis

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Q

What does an M3 receptor do to the endothelium?

A

Increase NO synthase

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Q

What does an M3 receptor do to the sphincters?

A

Relax them

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Q

What does an M3 receptor do to the GI?

A

Increase motility, secretion

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Q

What does an M3 receptor do to the lung?

A

Contract bronchial SM

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Q

What does an M3 receptor do to the detrusor?

A

Contract it

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Q

What does an M3 receptor do to the trigome?

A

Relax it

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Q

What does an M3 receptor do to the skin?

A

Increase secretions

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Q

What does an M3 receptor do to the saliva?

A

Increase K+, H2O secretion

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