Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PMP 101 > Action Potential And Neurotransmitters > Flashcards

Action Potential And Neurotransmitters Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards Psychology 101 flashcards Chemistry 101 flashcards Biology 101 flashcards Organic Chemistry 101 flashcards Sociology 101 flashcards
1
Q

What are the roles of the nervous system?

A

Receiving external sensory
Monitoring internal physiology
Interpreting the input

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the nervous system?

A

Electrical and chemical communication through out the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is membrane potential a result of?

A

Ion gradients

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the ion gradient outside of the cell membrane?

A

High Ca2+
High Na+
Low K+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the ion gradient inside the cell membrane?

A

High k+
Low Ca2+
Low Na+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does passive diffusion mean?

A

Diffuse freely

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does facilitated diffusion mean?

A

Ion channels
Down concentration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does active transport mean?

A

Against concentration gradient
Needs energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

An excitable membrane needs…

A

A negative membrane potential
Ion concentration gradients

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the resting membrane potential?

A

-70mV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the first step to action potential?

A

Action potential reaches threshold
Na+ channels open
Na+ flood in the cell membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the different stages of the action potential?

A

Hypo polarisation
Depolarisation
Repolarisation
Hyperpolarisation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What creates myelin?

A

Oligodendrocytes in central nervous system
Schwann cells in peripheral nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What wraps around the axon?

A

Schwann cells
Has gaps which are called Node of Ranvier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the synapse?

A

Structure at the end of an axon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the structure of a synapse?

A

Presynaptic neurone, synaptic cleft, post synaptic neurone

17
Q

What are the steps of neurotransmissiom across the synapse?

A

Ap depolarises the terminal
Calcium enters the cell
Triggers vesicles to move to the presynaptic membrane
Vesicles fuses with membrane leading to exocytosis of synaptic vesicles
Diffuse across cleft
Binds with receptors on the post synaptic cell

18
Q

What are the different types of synaptic receptors?

A

Ligand gated
Metabotropic

19
Q

What is depolarisation?

A

Movement of sodium ions into the cell through sodium voltage gated channels

20
Q

What is repolarisation?

A

Movement of potassium ions out of the cell through potassium voltage gated channels

21
Q

What happens in the refractory period?

A

movement of sodium and potassium through voltage gated channels to reestablish the gradient (-70mV)

PMP 101 (28 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions