If the sympathetic nervous system increases the production of saliva, the parasympathetic system
a. increases it more
b. decreases it
c. increases peristalsis
d. monitors it

If the production of saliva is increased by the symphatetic nervous system (SNS) then, the parasymphathetic nervous system (PNS) does almost exactly the opposite of the action of the SNS. Therefore, for this item what is done by the parasymphatetic nervous system is to decrease the production.

If the sympathetic nervous system increases the production of saliva, the parasympathetic system: Decreases it Parasymphatetic system always worked at the opposite direction of the sympathetic system. If the sympathetic increase the production of saliva the parasympathetic will work to retain. If the sympathetic increse the heart rate, parasympatheric will work to slowed it down.

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.