THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It sends its signal molecules through the blood.
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It sends its signal molecules quite a distance.
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It requires binding of a signaling molecule to a receptor.
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It persists over a long period.
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Detailed explanation-1: -Synaptic signaling between adjacent neurons is like hormone signaling in which of the following ways? It requires binding of a signaling molecule to a receptor. is called a ligand.
Detailed explanation-2: -Paracrine signaling acts on nearby cells, endocrine signaling uses the circulatory system to transport ligands, and autocrine signaling acts on the signaling cell. Signaling via gap junctions involves signaling molecules moving directly between adjacent cells.
Detailed explanation-3: -One unique example of paracrine signaling is synaptic signaling, in which nerve cells transmit signals. This process is named for the synapse, the junction between two nerve cells where signal transmission occurs.
Detailed explanation-4: -In paracrine signaling, a molecule released by one cell acts on neighboring target cells. An example is provided by the action of neurotransmitters in carrying signals between nerve cells at a synapse.
Detailed explanation-5: -Signaling molecules bind to the extracellular domain of two nearby tyrosine kinase receptors, which then dimerize. Phosphates are then added to tyrosine residues on the intracellular domain of the receptors and can then transmit the signal to the next messenger within the cytoplasm.