7693498
Description
Quiz by Wise Alice, updated more than 1 year ago
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Created by Riki M
about 9 years ago
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Copied by Wise Alice
almost 8 years ago
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Question 1
Question
Resting Membrane Potential is the difference across plasma membranes expressed in millivolts
Answer
- True
- False
Question 2
Question
Resting Membrane Potential is determined by..
Answer
-
Permeability to Na+ and K+
-
Permeability to Na+ and Ca+
-
Permeability to K+ and Ca+
Question 3
Question
When k+ concentration inside the cell is high, the electrical gradient will force K+ into the cell because the electrical gradient is stronger than the chemical gradient.
Answer
- True
- False
Question 4
Question
When Na+ concentration inside the cell is low, the cell will
Answer
-
Move Na+ into the cell because of the chemical gradient
-
Move Na+ out of the cell because of the electrical gradient
-
Move Na+ into the cell because of the electrical gradient
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Move Na+ out of the cell to reach an equilibrium
Question 5
Question
Resting membrane potential is -70mV
Answer
- True
- False
Question 6
Question
An Action Potential occurs when a threshold point of -40mV is reached
Answer
- True
- False
Question 7
Question
When an action potential begins, [blank_start]depolarisation[blank_end] occurs, causing [blank_start]Na+[blank_end] voltage gates to open and allow Na+ to flow [blank_start]into[blank_end] the cell.
Answer
-
depolarisation
-
Repolarisation
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Na+
-
K+
-
into
-
out
Question 8
Question
During the repolarisation phase of an action potential..
Answer
-
Na+ voltage gates close at -30mV (ICF)
-
Na+ voltage gates open
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K+ gates opening, allowing K+ to flow out the cell
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K+ gates close at -90mV (ICF)
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K+ gates open at -90mV(ICF)
Question 9
Question
The electrical signal (action potential) is sent along the axon of a nerve cell
Answer
- True
- False
Question 10
Question
What happens to the electrical signal (action potential) when it enters the axon terminal?
Answer
-
It enters the synaptic cleft as neurotransmitters
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it stays in the axon terminal
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It changes to a chemical signal
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Causes an influx of Ca+
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It continues as an electrical gradient
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