autocrine signaling
form of signaling that occurs when a cell secretes a signaling molecule that acts upon the cell that secreted it
cell surface receptor
receptor located on the plasma membrane
contact-dependent signaling
phenomenon occurring when a signaling molecule remains attached to the membrane of the signaling cell even while bound to the receptor on the target cell
endocrine cell
cell that secretes a hormone and releases it into the bloodstream
extracellular signal molecule
cue molecule, such as a hormone or growth factor, that sends information to target cells
hormone
chemical secreted by an endocrine gland that targets a particular cell to produce a response
intracellular receptor
receptor located in the cytoplasm
intracellular signal molecule
cue molecule, such as cAMP and proteins, working as a messenger or a chemical signal
ligand
molecule that binds to receptor proteins
long-distance signaling
type of communication whereby a signaling molecule acts on a target cell far from the signaling cell
molecular switch
protein that either enables or disables a signaling cascade by acting on a protein involved in the cascade
neuronal signaling
transmission of signals by nerve cells at a synapse
neurotransmitter
small signaling molecule secreted by a presynaptic neuron
paracrine signaling
type of signaling whereby signal molecules only diffuse through a short extracellular distance before they reach the target cell
receptor
protein that binds to a specific extracellular signal molecule, which then begins a cell response
short-distance signaling
type of communication whereby a signaling molecule acts on a target cell located close to the signaling cell
signal
coded message from one cell to another or within the cell itself
signal molecule
any molecule that involves the response of one cell to other cells or its environment
signal transduction
process by which a cell translates a chemical signal to a cellular response
signaling cell
cell that produces a signal molecule
steroid hormone
small hydrophobic hormone that can pass through the cell membrane and bind with an intracellular receptor
synapse
junction at which a neuron meets a target cell
target cell
cell that responds to a specific signal molecule