Position: 房老師的解題園地 > Forums > Discussion
Sympathetic nerve system has different kind of receptor.
Alpha 2 is the dominant one that makes GI tract relax.
Beta 2 is another receptor that cause smooth muscle to relax, too.
The problem is that alpha decrease cAMP, but beta 2 increase cAMP.
cAMP has been proved to relax smooth muscle for it inhibiting MLCK.
I wonder why cAMP plays different in smooth muscle cell.
(i've do some research but can't find the answer.)