neurons Flashcards
1
Q
3 types of CNS cells
A
- ) neurons
- ) Glia
- ) Others
2
Q
Features of neurons
A
- Have dendrites/cell body/axon/axon terminals
- Axon terminals communicate with other axons
- Communicate electrically via synapses
3
Q
Histology
A
- Large neurons: speckly pattern: missel body
- H&E: stains nucleic acids blue and proteins red
4
Q
What is LFB
A
LFB (luxol fast blue): stains myelin
5
Q
What is CV
A
Stains Nissl (RER)
6
Q
Types of neurons
A
- ) chemical
2. ) electrical
7
Q
Features of electrical synapses
A
- Have connexons and connecins
8
Q
Features of chemical synapses
A
- Rich in mitochondria
-
9
Q
How does synaptic transmission take place?
A
- Influx of calcium allows neurotransmitters to be released/fused on the membrane
10
Q
Dendritic spines
A
- Synapses are concentrated here
11
Q
Synaptic plasticity
A
- They are dynamic structures
- Neural plasticity: basis of learning and memory
- Spinal remodelling linked to neural activity
12
Q
Features of neuronal heterogeneity
A
Heterogenous for::
- ) size
- ) morphology
- ) neurotransmitters
13
Q
Features of upper motor neurons
A
- Large
- Excitatory
- Glutamatergic
- Long projection pyramidal cells
- Use GABA
14
Q
Oligodendrocyte features
A
- Myelinating cells of CNS
- Myelin insulates axons segments + enables rapid nerve conduction
- Provides metabolic support for axons]- Myelin sheath segments interrupted for nodes of ranvier
15
Q
Oligodendrocyte features
A
- Myelinating cells of CNS
- Myelin insulates axons segments + enables rapid nerve conduction
- Provides metabolic support for axons]- Myelin sheath segments interrupted for nodes of ranvier]
- can myelinate multiple axons