intro to cells of the nervous system
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biology 2: physiology
summary
this content delves into the intricate structure and functions of neurons and glial cells, which are pivotal to understanding the nervous system's operational framework.
- introduction to neuron structure, highlighting the soma, dendrites, axon, axon hillock, synaptic buttons, schwann cells, and nodes of ranvier.
- explanation of action potential propagation and the role of myelin in speeding up neural impulses.
- distinction between the peripheral nervous system (pns) and central nervous system (cns) myelin sheath cells: schwann cells in the pns and oligodendrocytes in the cns.
- overview of six major categories of glial cells, their functions, and differences between those in the cns and pns.
- discussion on astrocytes and satellite cells' roles in nourishment, structure, and ion balance, alongside microglia's immune function.
chapters
00:00
neuron structure and function
02:31
myelin and speed of impulse
04:16
glial cells: support and protection
06:14
astrocytes and satellite cells
08:18
microglia and immune function