Anatomy Of The Neuron And Its Types

Question 1

Axonal Transport Within Axon:

Anterograde vs. Retrograde

Answer 1

Anterograde - moves down Axon

Retrograde - moves up Axon

Question 2

Purpose of dendrites axon hillock and myelin sheaths relation to ap

Answer 2

Dendrites pick up information from other neurons
Axon hillock is the root of the axon where all nerve signals begin
Myelin sheaths accelerates action potential

Question 3

What does saltetory conduction consist of

Answer 3

Myelin sheaths
Nodes of ranvier

Question 4

Neuron Types - Features/Functions

Answer 4

1. Multipolar Neuron
   - make up 99% of neurons
   - Efferent = Motor Interneurons
2. Bipolar Neurons
   - special sensory. Ex. Eyes
3. Unipolar Neurons
   - Afferent = Sensory

Question 5

How is nerve bundling similar in categorization to muscles

Answer 5

Nerve fibers are wrapped in endoneurium to become a fascicle
Nerve fascicles are wrapped in perineurium to become a Nerve
Nerves are wrapped in epineurium

Question 6

Bundles of axons/cell bodies in the PNS vs. CNS

Answer 6

Axon bundles in the PNS is called a nerve, in the CNS it is a tract
Cell body bundles in the PNS is called a ganglion , in the CNS is a nucleus