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| Receptor Type |
 |
|
| Location |
 |
|
| Action |
 |
|
| M1- Cholinergic |
CNS |
IP3DAG Increase Calcium |
| M2- Cholinergic |
Heart |
Increase cAMP, Potassium |
| M3-Cholinergic |
Smooth Muscle, Glands, Circular Iris |
IP3DAG, Allow Drainage from Schlemm, Constrict Pupil, Accomodation, Increase GI motility/Secretions |
| Alpha1- Adrenergic |
Postsynaptic- smooth muscle |
IP3DAG, Vasoconstrict, Sphincter Constrict, Relax Detrusor, Dilate Pupil |
| Alpha2- Adrenergic |
PreSynaptic- Smooth Muscle, Fat, Platelets, Nerve Terminal |
Decrease cAMP |
| Beta1- Adrenergic |
Heart |
Increase cAMP, Increase HR and Contractions |
| Beta2- Adrenergic |
Smooth Muscle/Cardiac Vessels, GI, Urinary |
Increase cAMP, Eye Dilator, Relax Detrusor, Relax GI |
| Beta3- Adrenergic |
Fat |
Increase cAMP |
| D1 |
Renal |
Increase cAMP |
| D2-4 |
CNS |
Decrease cAMP |
|