Question

What is the purpose of the chemical transmitter in a control system?

to enter a cell at a specific receptor site
to increase the external stimulus acting on the cell
to decrease the internal stimulus
to neutralize the stimulus at the plasma membrane
cause an internal cell reaction which maintains homeostasis

Answer 1

To enter a cell at a specific receptor site

AND

To cause an internal cell reaction which maintains homeostasis

Step-by-step explanation:

Hope this helps! :D

Answer 2

A. to enter a cell at a specific receptor site.