C. 1) Plasma membrane receptors and signal transduction

Question 1

what are plasma membrane receptors

Answer 1

proteins that bind a specific extra-cellular signalling molecule or ligand

Question 2

define ligand

Answer 2

a general term for any substance (ion, molecule, or macromolecule) that can bind to a specific site on the receptor. can be on surface of another cell or a water soluble molecule

Question 3

fn of plasma membrane recptors

Answer 3

binding of signalling molecule to receptors send a signal inside cell producing a change in the expression of the genes in the cell