orginization of nervous system Flashcards
0
Q
what 4 things does the nervous system do?
A
- regulate muscle contraction–regulate movement
- regulate secretions from glands
- gather info about internal/external environment–maintain homeostasis
- stimulate thirst, hunger, survival mechanisms
1
Q
what is the nervous system?
A
network of neurons & support (glial) cells
2
Q
what system deals with centralization and cephalization?
A
Central Nervous System (CNS)
3
Q
centralization components:
A
brain and spinal cord
4
Q
cephalization components:
A
concentration of nervous structures into one end of body
-brain
5
Q
2 types of neural circuits in spinal cord
A
local
ascending/descending
6
Q
local neural circuit
A
- control the output of that segment
- primitive reflexes
- all types of neurons in same segment
7
Q
ascending/descending neural circuits
A
-communication to/from the brain for higher integration
8
Q
grey matter
A
- cell bodies
- synapses
- unmylinated axons
9
Q
white matter
A
- tracts of myelinated axons
- ascending and descending
10
Q
tract
A
bundle of myelinated axons
11
Q
groups of nerve cell bodies in CNS
A
nuclei
12
Q
bundle of neuron axons in PNS
A
nerve
13
Q
2 types of nerves
A
- cranial
2. spinal
14
Q
grouping of nerve cell bodies in PNS
A
ganglion
