BIOL130 Study Guide - Final Guide: Protein Kinase, Cell Membrane, Signal Transduction
8 Feb 2014
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Long range and very public style of communication. Involves endocrine cells sending the signal throughout the whole body. Done by secreting hormones throughout the blood stream (i. e. hormones) the pancreas) The cells that produce these hormones are called endocrine cells (e. g. paracrine short distance; less public. Short range and private style of communication. Signal molecules secreted by the signalling cell do not enter the blood stream. Thus, they act as local mediators on other nearby cells. Sometimes cells can even respond to the local mediators that they themselves produce (autocrine signalling) example: cancer cells: neuronal long distance; private. Neuron cells, like endocrine cells, can deliver messages over long distances. The message however is not broadcasted widely, but is delivered very quickly and specifically to individual cells privately. Axons extend from the neuron towards a target. When activated by signals from the environment from nerve cells, electric signals sends electrical impulses along the axon (up to 100m/s)
