01:119:101 Lecture Notes - Lecture 22: Neuromuscular Junction, Schwann Cell, Neuroglia

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*the body"s speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous systems. *the bodily system that in vertebrates is made up of the brain and spinal cord, nerves, ganglia, and parts of the receptor organs and that receives and interprets stimuli and transmits impulses to the effector organs. Graded potential shift in electrical charge in a tiny area of the neuron (temporary); transmits a long cell membranes leaving neuron and polarized state; needs higher than normal threshold of excitation to fire. A local voltage change in a neuron membrane induced by stimulation of a neuron, with strength proportional to the strength of the stimulus and lasting about a millisecond. A neural impulse; a brief electrical charge that travels down an axon. The action potential is generated by the movement of positively charged atoms in and out of channels in the axon"s membrane.

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