Nervous system

Question 1

What is the most abundant type of nervous tissue?

Answer 1

Neuroglia

Question 2

What do neuroglia do?

Answer 2

Protect, insulate and nourish neurons

Question 3

Are neuroglia mylenated?

Answer 3

They are both myelinated and unmyelinated

Question 4

Neuroglia is an umbrella term for several different types of cells such as?

Answer 4

Astrocytes, ependymal cells, microglia, schwann cells and oligodendrocytes

Question 5

A neuron is comprised of 3 portions, what are they?

Answer 5

Cell body, dendrites and axon

Question 6

What is the axon?

Answer 6

The arm of a neuron. It has myelinated and unmyelinated sections

Question 7

What are the unmyelinated sections of axons called?

Answer 7

Nodes of ranvier

Question 8

What is the purpose of nodes of ranvier?

Answer 8

Action potential (?)

Question 9

What are mixed nerves?

Answer 9

Nerves with both a sensory and motor function

Question 10

Where is somewhere where mixed nerves are found?

Answer 10

Eyeballs and tongue

Question 11

Sensory nerves carry information form the ______ to the _________

Answer 11

PNS to the CNS

Question 12

Motor nerves carry information from the ______ to the _______

Answer 12

CNS to the PNS

Question 13

What are interneurons?

Answer 13

Connects sensory and motor nerves

Question 14

Where are interneurons found?

Answer 14

Only in the CNS

Question 15

TRUE or FALSE: Nerves and neurons are the same thing

Answer 15

FALSE

Question 16

Is white matter myelinated or unmylinated?

Answer 16

Myelinated (fatty)

Question 17

Gray matter is myelinated or unmylenated?

Answer 17

Unmylenated

Question 18

What are some of the components of grey matter?

Answer 18

Unmyelinated axons, interneurons, synapses (in the middle of the brain)

Question 19

Where is grey matter found?

Answer 19

Brain and in the middle of the spinal cord (looks like a butterfly)

Question 20

Define neuroplasticity

Answer 20

The brain’s ability to reroute

Question 21

How many major types of strokes are there?

Answer 21

9

Question 22

What is the basal ganglia primarily composed of?

Answer 22

Grey matter

Question 23

Nerves impulses are also sometimes called what?

Answer 23

Action potential - it is when electrical signal convey information across a neuron and moves across a sensory route

Question 24

The resting state is also called what?

Answer 24

Polarization

Question 25

What happens during polarization?

Answer 25

Potassium (K+) leaks from the neuron

Question 26

The stimulated state is also called what?

Answer 26

Depolarization

Question 27

What happens during depolarization?

Answer 27

Sodium rushes in (Na+)

Question 28

What happens during repolarization?

Answer 28

Potassium (K+) rushes out

Question 29

What makes nervous function possible?

Answer 29

Sodium-potassium pump

Question 30

What is the speed at which action potential moves?

Answer 30

35m/s

Question 31

What is the name of the test used to determine the speed at which an individual's action potential moves?

Answer 31

Nerve conduction tests

Question 32

What is a synapse?

Answer 32

The connection point between nerves and tissues (including between neurons). An example of this is the neuro-muscular junction

Question 33

Give an example of a neurotransmitter

Answer 33

ACH, dopamine, serotonin...

Question 34

What are neurotransmitter?

Answer 34

Chemical messengers that allow neurons to communicate

Question 35

Give an example of an inactivator

Answer 35

ACHE (think NMJ process)

Question 36

Neurotransmitters are secreted from nerve A and goes to receptor on nerve B

Answer 36

Did you know this? (no specific question - just recalling)