BMS03-1019 Neural Tissue

Question 1

What’s integration?

Answer 1

Processing of information to find the best response

Question 2

What is the CNS responsible for?

Answer 2

Integration

Question 3

What is the peripheral nervous system?

Answer 3

Sensory input and motor output

Question 4

What are the 2 functions of glia?

Answer 4

Insulation and support of neurons

Question 5

Name the 4 types of glia

Answer 5

Schwann cells
Oligodendroglia
Microglia
Astroglia

Question 6

What do oligodendroglia do?

Answer 6

Form myelin in the CNS

Question 7

What do schwann cells do?

Answer 7

Form myelin around the peripheral NS

Question 8

How do the appearances of astroglia and microglia differ?

Answer 8

Microglia has thinner wires coming out of it

Question 9

What is the function of the microglia?

Answer 9

Defensive

Question 10

What is the function of astroglia?

Answer 10

Nutrition and support in the blood brain barrier

Question 11

What is a multipolar neuron?

Answer 11

Many processes from the cell body with only 1 axon

Question 12

Give an example of a multipolar neuron

Answer 12

Spinal motor neurons

Question 13

What are bipolar neurons?

Answer 13

2 processes extending from the cell body

Question 14

Give an example of a bipolar neuron

Answer 14

Retinal cells

Question 15

What are pseudounipolar neurons?

Answer 15

They have no dendrite and one axon that splits and one branch goes to the spinal chord and the other to the skin/muscle

Question 16

How does myelin increase conduction speed?

Answer 16

Reduces leakage

Question 17

What does myelin consist of mainly?

Answer 17

Lipids

Question 18

Whats the difference between the myelination of schwann cells and oligodendrocytes?

Answer 18

Schwann cells can only myelinated a section of one axon, not multiple axons

Question 19

What is a mesaxon?

Answer 19

Schwann cells that are edge to edge touching

Question 20

What is the distance between 2 nodes of ranvier called?

Answer 20

Internode

Question 21

What is uncompacted myelin called?

Answer 21

Schmidt-Lanterman clefts

Question 22

What does schwann cell cytoplasm do?

Answer 22

Maintain the sheets of schwann cells

Question 23

What is white matter/nerves?

Answer 23

Collection of myelinated axons

Question 24

What is grey matter/ganglia?

Answer 24

Collection of cell bodies

Question 25

What is ventral and dorsal?

Answer 25

Ventral is towards the belly and dorsal is towards the back

Question 26

What do satellite cells do?

Answer 26

Cover cell bodies and support glial cells

Question 27

What is special about the dorsal root ganglion?

Answer 27

Comes out of the spinal chord and is a group of cell bodies of sensory neurons

Question 28

What's in ganglia?

Answer 28

Cell bodies and synapses

Question 29

What does the somatic NS do?

Answer 29

Control of voluntary muscles, receives signals from heat, pain and touch receptors

Question 30

What is the ANS?

Answer 30

The thing that controls involuntary movement and it's made of the sympathetic and parasympathetic NS

Question 31

Where are autonomic ganglia located?

Answer 31

``` Sympathetic trunk (bulges of nerves next to spine) Organ walls Peripheral plexuses (network of nerves) ```

Question 32

What makes the connective tissue surrounding peripheral nerves?

Answer 32

Fibroblasts

Question 33

What are the 3 layers of connective tissue?

Answer 33

Epineurium Perineurium Endoneurium

Question 34

What is endoneurium?

Answer 34

Connective tissue surrounding individual nerves

Question 35

What is perineurium?

Answer 35

Fibroblasts

Question 36

What are fascicles?

Answer 36

Bundles of nerves

Question 37

What is epineurium?

Answer 37

Connective tissues surrounded all nerve fibres