Nervous System

Question 1

functions of nervous system

Answer 1

• Collect, analayze, encode and interpret the stim from both internal and external environments
• coordinate most body function, motor, visceral, endocrine and mental

Question 2

3 divisions of the NS

Answer 2

1. PNS
2. CNS- brain + spinal cord, nuclei (white + grey matter)
3. ENS (digestive system)

Question 3

2 Major cell types in the PNS

Answer 3

Neuronal cells- recieve and transmit impulses

Neuroglial cells- support and protect the neuron (shwan cells insulate)

Question 4

3 types of neuron structures

Answer 4

1. bipolar- one axon one dendrite (eye)
2. unipolar- one axon divided into two branches
3. multipolar- one axon multiple dendrites (motor)

Question 5

3 types of neuroglial cells

Answer 5

1. astrocyte
2. Oligodendrocyte
3. microglia

Question 6

Astrocyte function

Answer 6

• structural

- associated with nerves and vessels around neres, able to mudulate blood flow

Question 7

Oligodendrocytes function

Answer 7

Function in electrical insulation and in myelin production in the CNS
-sits on the nerve axons and wrap around to protect the nerve terminals

Question 8

Microglia

Answer 8

resident immune cells of the brain and PNS

Question 9

Schwan cells function location

Answer 9

located in the PNS where they envelop axons with either myleination or non myleination

Question 10

Symptoms of peripheral neuropathy

Answer 10

• Gradual onset of numbness + tingling in your feet or hands, which may spread into your legs and arms
• burning pain
• sharp, jabbing or electric like pain
• extreme sensitivity to touch
• lack of coordination
• muscle weakness

Question 11

diabetic foot features

Answer 11

Feet will appear cold on temp scan but there is poor nervous function in them, will not feel certain things

Question 12

Causes of diabetic foot

Answer 12

• Trauma or pressure in the nerve
• diabetes
• vit defitiencies
• alcoholism
• autoimmune diseases

Question 13

what is diabetic neuropathy

Answer 13

• increaed blood glucose may cause narrowing of blood vessels supplying nerves. These damaged blood vessels might leakcompounds into the nerves that damage them or fail to provide nerve w enough ox
• also may stim attack of coating around nerve

Question 14

connective tissue of nerves (3 layers)

Answer 14

-Endoneurium- thin layer of connective tissue associated w indv axons

Perineurium- sorounds groups of axons called fasicles

Epineurium- layer of dense connective tissue that sourounds and binds together many nerve fasicles