Match the Following. -Receptor

Match the following.
-receptor

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