Describe5 marksChallenge
A researcher is investigating how a newly discovered signalling molecule, named Factor X, coordinates responses in an animal. Factor X is released from endocrine cells and travels in the blood to target cells, where it binds to receptors on the cell surface membrane.
Describe the fluid mosaic model of the cell surface membrane, including the roles of phospholipids, cholesterol, glycolipids, proteins and glycoproteins. Then describe the main stages of cell signalling that occur when Factor X reaches its target cell.