16 terms

Neuron

STUDY
PLAY
Dendrites
Receives information and transmits to cell body
nucleus
...
axon hillock
...
cell body
made up of protoplasm containing nucleus
myelin sheath
white fatty sheath that wraps around the axon
axon
sends information via excitatory or inhibitory neural impulses
synaptic terminals (terminal buttons)
...
Node of Ranvier
gap in myelin sheath between adjacent Schwann cells
Internode
portion of nerve fiber between two nodes of ranvier
How does an axon work?
- Conducts impulse away from cell body via sodium-pottassium pump
-Depolarization begins the degeneration of an action potential which travels toward the terminal button
-AP is the "neural impulse"
Myelin
Sheath is formed by neuroglial cells (oligodendrocytes in CNS: Schwann cells in PNS)
Neuron
main functional unit
neuroglia (glue) cells
supportive cells
1. provide stuctural support and insulation
2. contribute to neural metabolism
3. aid in repair when neurons are damaged.
The synapse
Space between presynaptics terminal button and post synaptic cell membrane. The button contains contains synaptics vesicles filled with neurotransmitters.
Axon
sends information via excitatory or inhibitory neural impulses
Axon
sends information via excitatory or inhibitory neural impulses
YOU MIGHT ALSO LIKE...