TEST 2: Nervous System Flashcards
1
Q
Divisions of Nervous System
A
AFFERENT (sensory) DIVISION: Ascending Pathway
- Somatic Sensory
- Visceral Sensory
- Special Sensory
EFFERENT (motor) DIVISION: Descending Pathway
- Somatic Motor (vountary)
- Automatic
- —Sympathetic
- —Parasympathetic
- —Enteric
2
Q
Cell Body
A
Cell Body (Soma)
- -Axon Hillock: Decision Making
- —-Summation
3
Q
Dendrites
A
receive incoming impulses
4
Q
Axon
A
send out signals
- —-Axon Terminals
- —-Synaptic Knobs
- —-Neurotransmitters
- ——–Vesicles
- ——–Ach-cholinergic (Alpha Motor Neurons)
- ——–NE- adrenergic
5
Q
Synapse
A
2 Neurons involved
- Presynaptic Terminals
- Post Synaptic Receptors
- —primarily on dendrites
- Synaptic Cleft
- Unidirectional
6
Q
Myelin
A
- Oligodendrocytes
- Schwann Cells
- Nodes of Ranvier
- Salatory Conduction
7
Q
Oligodendrocytes
A
myelin-forming cells in CNS
8
Q
Schwann Cells
A
myelin-forming cells in PNS
9
Q
Nodes of Ranvier
A
gaps between myelin
10
Q
Salatory Conduction
A
apparent jumping of impulse from node to node
- impulse travels 50-150x faster
- trasmit more urgent info
