Co-ordination Flashcards
How do multicellular organisms signal between cells?
By using extracellular signalling molecules
What are some examples of extracellular molecules?
Steroid hormones, peptide hormones and neurotransmitters
What are receptor molecules of target cells?
Proteins with a binding site for a specific signal molecule
What does binding do to the receptor?
It changes the conformation of the receptor which initiates a response within the cell
What can different cell types produce?
Specific signals that can only be detected and responded to by cells with the specific receptor
Why do signalling molecules have different effects on different target cell types?
Because they have different intracellular signalling molecules and pathways that are involved
In multicellular organisms what may different cell types show?
A tissue specific response to the same signal
