Test 1.1

Question 1

What is the function of the choroid plexus

Answer 1

To maintain chemical environment of the CNS

Question 2

What are the THREE layers of connective tissue called

Answer 2

Meninges

Question 3

What is the layer between the skull and brain which is the most durable

Answer 3

Dura mater

Question 4

What does myelin do

Answer 4

It speeds up neurotransmitter through insulation also reduces capacity

Question 5

True or false

The speed of neurotransmitter is extremely important for getting quick info for communication

Answer 5

True

Question 6

True or false

Myelin is not important

Answer 6

False

Myelin is extremely important without it your brain will not work

Question 7

Which cell takes the most info and sends it to one place and where is it located

Answer 7

Cerebellar Purkinje cell and located inside the cerebellum

Question 8

True or false

Glial cells transmit info

Answer 8

False they do not transmit info but they ARE important

Question 9

What do astrocytes do

Answer 9

Process neurotransmitter into dopemine and maintain chemical environment

Question 10

What forms myelin sheaths and adds structure stability

Answer 10

Oligodendrocytes

Question 11

What does a Schwann cell do?

Answer 11

Form myelin in the PNS

Question 12

Are all neurons myelinated?

Answer 12

No

Question 13

Is the CNS a chemical organ or electrical

Answer 13

Electrical

Question 14

Where does the analog part of the CNS take place?

Answer 14

In the dendrites and soma

Question 15

What does a neuron do?

Answer 15

Stores potential energy and sends signals

Question 16

Is the nervous system info transmitted slowly or fast and how is it transmitted

Answer 16

Slowly by moving big ions

Question 17

What is a current

Answer 17

It is a change in electrical signal and if it moves over space it looks like movement

Question 18

What is movement of ions called

Answer 18

A Current

Question 19

Everything before the dendrites is________ &_________.

Everything after the axon hillock and to and from the axon is _________ &________

Answer 19

1) receptive and passive

2) active and transmission

Question 20

What are microglia

Answer 20

They are macrophages which are big debris eaters

Question 21

Where does the digital part of the nervous system take place

Answer 21

In the axon (aka action potential) which a all or none response

Question 22

What happens if you get an action potential

Answer 22

You will receive a change in voltage

Question 23

What is an action potential

Answer 23

A flow of ions

Question 24

What does myelin allow for in the axon

Answer 24

It allows for sodium to be pushed down the axon

Question 25

What is saltatory conduction

Answer 25

Jumping conduction which comes from sodium ions being pushed by the opening of channels inbetween the myelin

Question 26

what are the Nodes of Ranvier

Answer 26

Opening of channels on the axon

Question 27

explain what a Gap Junction is

Answer 27

It is two ions channels that allows the flows of current to happen between cells which is rare

Question 28

Is a Gap junction a electrical synapse or chemical synapse

Answer 28

Electrical synapse

Question 29

What is a chemical synapse responsible for

Answer 29

For intergration of neuronal info and communication from one neuron to the next

Question 30

What does an action potential allow for

Answer 30

Allows for an opening up of a channel to allow concentration gradients to happen

Question 31

What does a synaptic release require

Answer 31

Calcium

Question 32

Explain what defines a neurotransmitter

Answer 32

1) must be present in pre-synaptic neuron 2) must be released in response to depolarization/ action potential 3) release must be dependent of Ca+ 4) has to activate a membrane on post-synaptic cell

Question 33

Which layer in the skull has spider web-like fibers that connect it to Pia mater

Answer 33

Arachnoid mater

Question 34

What is the thin layer over the brain

Answer 34

Pia mater

Question 35

What are sinuses in the brain

Answer 35

They are big veins that empty blood from the brain

Question 36

What does retinal bipolar cell do?

Answer 36

Takes info from a straight line from one place to another and is a very simple cell

Question 37

What is it called when the brain transmits info from neuron to neuron

Answer 37

Circuit

Question 38

What is CSF

Answer 38

It is filtered blood which is filtered through the capillary system in each ventricular called Choroid Plexus