Download chapter 48: nervous system

CHAPTER 48: NERVOUS SYSTEM
I.
Endocrine vs. Nervous
Nervous
Complexity
Structure
Communication
Response Time
II.
Nervous systems perform 3 overlapping functions
1.
2.
3.
 functions involve both parts:
1. Central nervous system (CNS):
2. Peripheral nervous system (PNS):
III.
Nervous system composed of neurons & supporting cells
A. Neurons:

cell body:

dendrites:

axons:

synapse;

neurotransmitters:

3 types of neurons:
1.
2.
3.
Endocrine

IV.
B. Supporting Cells:
glial cells:
astrocytes:
oligodendrocytes:

Schwann cells:

Why insulate?
Impulses are action potentials
A. Origin of Electrical Membrane Potential
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B. Membrane Potential Changes & The Action Potential
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C. Propagation of Action Potential
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
D. Action Potential Transmission Speed
factors affecting speed of potential propagation:
1.
2.