Match the Following. -Secondary Messenger

Match the following.
-secondary messenger

A) a site on a cell that interacts with some external chemical messenger in order to enable a response to occur
B) a chemical messenger that is produced in the nervous system
C) the intended site of a specific chemical reaction
D) a substance introduced from outside the body that alters some body function
E) an example of a polypeptide hormone
F) a molecule within a cell that is released in response to the interaction of a hormone or neurotransmitter with a receptor outside the cell
G) a chemical messenger that is produced in the endocrine system and indirectly regulates biochemical processes
H) an example of a steroid hormone
I) an example of an amino acid hormone