Explain Receptor as drug targets.

Explanation

(i) Many drugs exert their physiological effects by binding to a specific molecule called a receptor whose role is to trigger a response in a cell. (ii) The chemical messengers, bind to the active site of these receptors. This brings about the transfer of message into the cell. (iii) The chemical messengers bind to the active site of these receptors. (iv) This brings about the transfer of message into the cell. (v) These receptors show high selectivity. (vi) If we want to block a message, a drug that binds to the receptor site should inhibit its natural function. (vii) Such drugs are called antagonists. (viii) In contrast, there are drugs which mimic the natural messenger by switching on the receptor. These type of drugs are called agonists.