HAN 200 Lecture Notes - Lecture 11: Central Nervous System, Afferent Nerve Fiber, Somatic Nervous System
6 Aug 2018
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Injured or lost neurons are not replaced. d: classifications of neurons, neurons are classified by structure or function, three anatomic classes of neurons, multipolar neurons, bipolar neurons, unipolar neurons, functional classes of neurons, motor neurons, sensory neurons iii. Interneurons: comparison of structural classes of neurons, multipolar: 1 axon, many dendrites. 2: white matter: bundles of myelinated fibers, gray matter: cell bodies and unmyelinated fibers, mixed nerves: most nerves contain sensory and motor fibers, sensory nerves: mostly afferent fibers. In the body, electrical currents are caused by the flow of ions. When a neuron is adequately stimulated, an electrical impulse is generated and is conducted along the entire length of its axon. Therefore, potassium ions pumped into the neuron can diffuse back out in an. However, very little sodium pumped out of the neuron can diffuse back in. Voltage-gated sodium, potassium, or calcium channels: the function of mechanically gated channels, open in response to physical distortion of the membrane surface b.
