The cells of the nervous system Flashcards Preview

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Flashcards in The cells of the nervous system Deck (15):
1

Microtubules

Form long scaffolds that extend from one end of a neuron to the other. Maintain cell shape
-Structured of protofilaments
-Stabilized by MAPs
-Polarized with - end toward cell body + end toward synapse

2

Neurofilaments

Bones of the cytoskeleton
Most abundant in axons

3

Microfilaments

2 strands of actin monomers in a double helix
Structure to hold signals and create functional areas

4

Polymerization

Make longer

5

Depolymerization

Make shorter

6

Fast axonal transport

Carries membranous organelles along microtubules

7

Slow axonal transport

Carries cytoskeleton proteins
Only travels in anteriograde direction

8

Anteriograde fast transport

Away from cell body using Kinesin

9

Retrograde fast transport

Toward cell body using MAP 1C

10

Types of dendritic spines

Thin
Stubbly
Mushroom shaped

11

Ependyma

Helps move around CSF

12

Choroid Plexus

Continuous with ependyma
Filters plasma in blood to create CSF

13

Astrocytes

Present in all areas of the brain
Form blood brain barrier
Regulate neurotransmitter concentration
Help stabilize synapse

14

K+ buffering

Neuron releases potassium
Astrocytes take up excess potassium

15

Microglia

Derived from bone marrow
WBC function in the brain