Cell Membrane - Signalling and Permeability

Cell signalling is used to control processes inside the body when the environment changes this happens by:

1. One cell releasing a messenger molecule for example a hormone.

2. The molecule travels in the blood to another cell.

3. The messenger is detected by another cell when it binds to a receptor on its membrane.

The membrane receptors are specific shapes (complimentary) so only the correct messenger molecule can bind to the correct target cell for example glucagon a hormone released when there isn't enough glucose in the blood and…