Comparison of Muscarinic receptor types
Type
Gene
Function
Effectors
Agonists
Antagonists
*   secretion from salivary glands and stomach
no
(yes)
no
(yes)
*   McNA343
*   slow heart rate
*   reduce contractile forces of atrium
*   reduce conduction velocity of AV node
*   In CNS
yes
no
*   smooth muscle contraction
*   In CNS
*   induce emesis
no
no
*   Enhanced locomotion  
*   In CNS
yes
 ?
* In CNS
no
 ?
PTX:pertussis toxin
CTX:Cholera toxin

資料來源:維基百科

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