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Kines 360 > Test 1.1 > Flashcards

Test 1.1 Flashcards

1
Q

What is the function of the choroid plexus

A

To maintain chemical environment of the CNS

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2
Q

What are the THREE layers of connective tissue called

A

Meninges

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3
Q

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

A

Dura mater

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4
Q

What does myelin do

A

It speeds up neurotransmitter through insulation also reduces capacity

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5
Q

True or false

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

A

True

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6
Q

True or false

Myelin is not important

A

False

Myelin is extremely important without it your brain will not work

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7
Q

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

A

Cerebellar Purkinje cell and located inside the cerebellum

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8
Q

True or false

Glial cells transmit info

A

False they do not transmit info but they ARE important

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9
Q

What do astrocytes do

A

Process neurotransmitter into dopemine and maintain chemical environment

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10
Q

What forms myelin sheaths and adds structure stability

A

Oligodendrocytes

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11
Q

What does a Schwann cell do?

A

Form myelin in the PNS

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12
Q

Are all neurons myelinated?

A

No

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13
Q

Is the CNS a chemical organ or electrical

A

Electrical

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14
Q

Where does the analog part of the CNS take place?

A

In the dendrites and soma

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15
Q

What does a neuron do?

A

Stores potential energy and sends signals

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16
Q

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

A

Slowly by moving big ions

17
Q

What is a current

A

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

18
Q

What is movement of ions called

A

A Current

19
Q

Everything before the dendrites is________ &_________.

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

A

1) receptive and passive

2) active and transmission

20
Q

What are microglia

A

They are macrophages which are big debris eaters

21
Q

Where does the digital part of the nervous system take place

A

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

22
Q

What happens if you get an action potential

A

You will receive a change in voltage

23
Q

What is an action potential

A

A flow of ions

24
Q

What does myelin allow for in the axon

A

It allows for sodium to be pushed down the axon

25
Q

What is saltatory conduction

A

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

26
Q

what are the Nodes of Ranvier

A

Opening of channels on the axon

27
Q

explain what a Gap Junction is

A

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

28
Q

Is a Gap junction a electrical synapse or chemical synapse

A

Electrical synapse

29
Q

What is a chemical synapse responsible for

A

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

30
Q

What does an action potential allow for

A

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

31
Q

What does a synaptic release require

A

Calcium

32
Q

Explain what defines a neurotransmitter

A

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

33
Q

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

A

Arachnoid mater

34
Q

What is the thin layer over the brain

A

Pia mater

35
Q

What are sinuses in the brain

A

They are big veins that empty blood from the brain

36
Q

What does retinal bipolar cell do?

A

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

37
Q

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

A

Circuit

38
Q

What is CSF

A

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

Kines 360 (10 decks)

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