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cell signaling
process by which messages are sent out to cells…allows for coordination and control and response to stimuli
cell signaling pathway
stimuli received by receptor…transduction occurs…message transmitted to effector…appropriate response is made
transmission
requires crossing of barriers like plasma membranes
cell surface membrane
controls which molecules can move between the internal and external environments of the cell
ligands
signaling molecules involved in secretion, transport across barriers and binding to surface receptors
ligand message
carried by chain of chemical messengers inside the cell triggering a response