What is the purpose of the chemical transmitter in a control system?
to decrease the internal stimulus
to enter a cell at a specific receptor site
to neutralize the stimulus at the plasma membrane
cause an internal cell reaction which maintains homeostasis
to increase the external stimulus acting on the cell

to enter a cell at a specific receptor site

cause an internal cell reaction which maintains homeostasis

Explanation:

Just accpet the answer

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

the index of refraction of the second medium is higher. i just took the test trust me !