2A - Neurohistology (1) Flashcards
1
Q
Neurocytology
A
-cells associated with nervous system
2
Q
Neurohistology
A
-cells associated to form tissues
3
Q
CNS cell types:
A
- Neurons: main functional elements
- Glia: supporting cells
- Ependymal cells: Nervous system develops from neural tube, which is hollow. CNS maintains that hollowness with various spaces inside. Spaces are lined with specacialized tissue called ependyma
- Blood vessels
4
Q
Coming off of cell body
A
dendrites
5
Q
Axons are ensheathed by glial cells
A
Produce white fatty myelin
6
Q
Myelin in not continuous
A
Nodes of Raniver interrupt
7
Q
Nissl Stain
A
- can see cell bodies
- CANNOT see dendrites/axons/neurites
- cytoplasm of glial cells does not stain well
8
Q
Nucleolus
A
- site at which ribosomal RNA is synthesized
- heavy protein synthesis
9
Q
Axon hillock
A
- lacks Nissl
- Action potentials generated
- 1 spike trigger zone
10
Q
Franz Nissl
A
- Lumbar puncture - drain CSF that fills inside CNS
- Staining
11
Q
Neuronal Classifications
A
1) . size of cell body
2) . shape of cell body/dendrites
3) . presence or absence of spines
4) . axonal morphology
5) . chemical identity
12
Q
Cell body shapes
A
1) Round
2) Spindle shaped (fusiform) –> slender, elongated, ellipsoidal-shape
3) Multipolar (many dendrites)
4) Pyramidal
13
Q
Space between neurons
A
Neuropil
14
Q
Cortical pyramidal cells
A
- 1 big dendrite go in same dierction
- dendrites point toward surface of brain
15
Q
Nissl Stain
A
-can see space
