Nerves

Question 1

Perikaryon

Answer 1

Cell body

Question 2

Nissl Substance

Answer 2

Corresponds to a stack of concentrated rER

Question 3

Neurofilaments

Answer 3

Cytoskeletal functions

Question 4

Dendrites

Answer 4

Receive stimuli from other neurons at synapses

Question 5

Axon

Answer 5

Single long process that generate and conduct nerve impulses

Question 6

Axolemma

Answer 6

Plasma membrane of the axon

Question 7

Axon hillock

Answer 7

Pyramid shaped region where axon originates from the perikaryon

Question 8

3 main parts of a neuron

Answer 8

1. Cell body
2. Axon
3. Dendrites

Question 9

Multipolar neurons

Answer 9

One axon, two or more dendrites

Question 10

Bipolar neurons

Answer 10

One dendrite, one axon

Question 11

Pseudounipolar (or unipolar)

Answer 11

Single axon - one branch extends towards the periphery and the other towards the CNS

Question 12

PNS Cells

Answer 12

Schwaan cells - produce myelin and aid in cleaning up PNS debris

Question 13

Satellite cells

Answer 13

In PNS - do not make myelin

Question 14

CNS Cells

Answer 14

Astrocytes - physical and metabolic support for neurons in CNS
Microglia - equivalent to macrophages
Ependyma cells - Create CSF

Question 15

Connective Tissue components of Peripheral nerve

Answer 15

Endoneurium - loose CT surrounding a single nerve fibres
Perineurium - around a bundle of nerve fibres
Epineurium - dense irregular CT surrounding the nerve fascicles

Question 16

What comprises gray mater

Answer 16

Perikarya and astrocytes

Question 17

What comprises white mater

Answer 17

Tracts of myelinated axons (no perikarya)

Question 18

3 layers of the Cerebellum

Answer 18

1. Molecular layer
2. Purkinje cell layer
3. Granular layer

Question 19

Purkinje cells

Answer 19

Efferent neuronal cells

Question 20

What conspicuous cell type is found in the cerebrum?

Answer 20

Pyramidal cells - efferent multipolar