This article throws light upon the four main types of receptors. The types are: 1. Receptors for Fast Neurotransmitters 2. Receptor for many Hormones and Slow Transmitters 3. Receptors for Insulin and Various Growth-Factors 4. Steroid Receptors. Type # 1. Receptors for Fast Neurotransmitters: These are coupled directly to an ion- channel. These receptors are […]