01:119:116 Lecture Notes - Lecture 17: Spinal Cord, Cytosol, Sensory Neuron
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5 Apr 2016
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Id the parts and functions of a neuron. Describe membrane potential, how is it established, what is polarization, hyperpolarization and depolarization. What is occurring at each stage, how do levels of na and k change, iov. Describe sodium potassium pump, what is it function. Conduct messages as electrical signals and integrate information. Variety of shapes and sizes but all have similar components. End of axon divides (usually) into many branches. Nerve= axons of many neurons, held together with connective tissue. Some ions can cross, some cannot = polarity is the result. Result is that there is a difference in % ions inside (cytosol) and outside (extra- cellular fluid) of membrane. Only excitable cells can rapidly generate changes in membrane potential. Resting potential (rp) between -60 and -80 mv. Na k pump 3 na out 2 k in. As the move, they carry an electrical charge.
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