🚀 go-pugleaf

Hi,

I'm doing a little class work regarding the ANS and came up with a question
that my professor didn't seem to be able to answer.  What I want to know
is:

Once a stressor rears its ugly head, the sympathetic NS activates targets
by both direct innervation as well as by the release of epi and norepi from
the adrenal medulla.  The direct innervation works immediately while the
epi/norepi is a little slower in reaching the targets but once there it
reinforces and prolongs the sympathetic activation.  Is there a latency
period between sympathetic activation and parasympathetic (de)activation of
the targets (so as to allow the adrenaline to be metabolized), or does the
parasympathetic work to reverse the sympathetic effects while adrenaline is
still acting on the target organs?  In other words, does the parasymp. have
to "compete" with the adrenaline until it's metabolized?  If so, does this
have anything to do with the "parasympathetic rebound" phenomena?  

Any light that can be shed for me will be greatly appreciated.

Thanks,
Nate