Cell Membranes and Signalling

Cell Signalling

• Cells communicate to control processes inside the body and respond to changes in the environment.
• Cell signalling uses messenger molecule.
• It starts when one cell releases a messenger molecule (hormone)
• This molecule travels to another cell (in the blood)
• The messenger molecule is detected as it binds to a receptor on the cell membrane.
• The binding then triggers a change in the cell (series of chemical signals are set off)

Membrane Receptors

• Receptor proteins have specific shapes - only messenger molecules with…