nervous system 2 physiology

Nervous System 2: Neurophysiology

Outcomes

1.      Explain what are membrane ion channels and briefly outline how they function

2.      Differentiate between gated and non-gated (leakage) ion channels

3.      Differentiate between chemically gated, voltage gated and mechanically gated ion channels

4.      Explain how the resting membrane potential is generated

5.      Outline how membrane potentials can function as ‘signals’

6.      Describe a graded potential

7.      Describe an action potential included the changes that take place in each of the stages depolarisation, repolarisation and hyperpolarisation

8.      Describe what is a synapse and distinguish between electrical and chemical synapses

9.     

?
in regards to membrane potentials as signals which is false
change in membrane potential results in changes in membrane permability by the opening of non gated ion channels
1 of 11
depolarisation and repolarisation which is true
depolarisation increases the probability of a nerve impulse
2 of 11
in regards to graded potentials which is true
stimulation to the plasma membrane causes the inside of the cell to become less negative
3 of 11
in regards to the generation of an action potential which is false
stage 3 repolarising K+ rushes out of cell through mechanical gates
4 of 11
stage 2 the depolarising phase which is false
threshold is reached at -60Mv
5 of 11
in regards to propagation of an action potential which is true
every AP that is propagated is the same as the original AP
6 of 11
threshold which is false
all local depolarisation events produce an AP
7 of 11
absolute refactory period which is false
during hyperpolarisation of the neuron the threshold is reduced
8 of 11
classification of nerve fibres which is false
the ANS only contains Group B fibres
9 of 11
Local anesthetics block voltrage gated Na+ channels resulting in a greater action potential?
False
10 of 11
excitatory synapses are needed to cause excitatory post synaptic potentials?
True
11 of 11

Other cards in this set

Card 2

Front

depolarisation and repolarisation which is true

Back

depolarisation increases the probability of a nerve impulse

Card 3

Front

in regards to graded potentials which is true

Back

Preview of the front of card 3

Card 4

Front

in regards to the generation of an action potential which is false

Back

Preview of the front of card 4

Card 5

Front

stage 2 the depolarising phase which is false

Back

Preview of the front of card 5
View more cards

Comments

Mel Dyer

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Q10 0 should this not be Na stopped by the inactivation gates if you want it to be true?

Mel x

Mel Dyer

Report

Q10 0 should this not be Na stopped by the inactivation gates if you want it to be true?

Mel x

Mel Dyer

Report

Q10 0 should this not be Na stopped by the inactivation gates if you want it to be true?

Mel x

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