2_27_07 - February 27, 2007 Biology 130 Cell-Cell...

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February 27, 2007 Biology 130 Cell-Cell Communication Outline: Cell cell communication Synapsis Motor-end plate example Response – muscle contraction Generals of cell cell communication Plasmodesmata Gate junctions - interalateral dics Autocrine Paracrine Endocrine system Intracellular receptor Membrane receptor Ion channel Tyrosine kinases G protein linked Adenyl cyclase Guanyl cyclase Phapholipose C Neurotransmitters are released by a neuron synapses to induce a response in another neuron or muscle cell or gland. (functional definition) Hormone is a signaling compound released by a cell into the bloodstream. o Signaling molecule not transmitted by the bloodstream are not hormones. Resting potential, graded potential, action potential – must know Excitatory synapse – o open up sodium channels by Allosteric modulation to make cell more positive creating action potential - Inhibitory synapse – o hyperpolarization – cells open potassium channels. Increase negative
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2_27_07 - February 27, 2007 Biology 130 Cell-Cell...

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