BIOL 130 Lecture Notes - Lecture 21: Cell Signaling, Cell Membrane, Codocyte
Document Summary
Gap junctions ions can transmit signals (gap junctions allows communication between cells) When they come together, it will generate a signal going in one way or both ways. This happens in our immune system: synaptic signaling. Cells can be very close to each other. They then go to the target cell, transmitting the signal: paracrine. A cell that hold secretory vesicles secrete local regulators (signals) These signals then go to nearby target cells. This type occurs when the cells are in the same general area: endocrine. An endocrine cell secretes hormones, which then goes to the bloodstream. The bloodstream takes these hormones to a specific target cell somewhere else in the body. This type sends signals from cells that are far away from each. Three steps of signaling: receptor/ligand binding. A ligand binds to the receptor on the target cell: receptors are proteins, usually changes shape when ligand binds to it, not all cells have the same receptor.
