BIOL 361 : Bio361-action potentials and diversity of AP shape.pdf
Document Summary
Diversity of apshape-3distinct functions of neurons-receive+integrate incoming signals,conduct signals thru cell+transmit signals to other cells. +spinal cord)-interneurons-located w/in cns+convey signals from one neuron to another,many dendrites-efferent neurons-convey signals from the. +conveys signals to the cell body,functionally similar to a dendrite 2. conveys signals away from the cell body,like an axon);least common in vertebrates; @the end of one processes detect incoming signals+transduce them into a graded potent->spreads electrotonically to the cell body->ap triggered in the. +regrowth of damaged axon,provide a pathway for neuronal regrowth. 2. oligodendrocytes-wrap around the axons of neurons in the cns (form myelin sheath;wraps around the axon of several neurons), allowing for faster conduction of action potentials. 3. astrocytes-have many functions, including regulating the substances (including neurotransmitters) present in the extracellular space surrounding neurons,transporting nutrients to neurons, removing debris,guiding neuronal development,regulating the contents of the extracellular space around neurons+synaptic neurotransmitter levels. Action potentials-long distance-transmitted w/out degrading-3 phases-1. depolarization phase-triggered when mp@action hillock(net graded potential)
