3988712
Questão 1
Questão
Resting Membrane Potential is the difference across plasma membranes expressed in millivolts
Responda
- True
- False
Questão 2
Questão
Resting Membrane Potential is determined by..
Responda
-
Permeability to Na+ and K+
-
Permeability to Na+ and Ca+
-
Permeability to K+ and Ca+
Questão 3
Questão
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.
Responda
- True
- False
Questão 4
Questão
When Na+ concentration inside the cell is low, the cell will
Responda
-
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
-
Move Na+ out of the cell to reach an equilibrium
Questão 5
Questão
Resting membrane potential is -70mV
Responda
- True
- False
Questão 6
Questão
An Action Potential occurs when a threshold point of -40mV is reached
Responda
- True
- False
Questão 7
Questão
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.
Responda
-
depolarisation
-
Repolarisation
-
Na+
-
K+
-
into
-
out
Questão 8
Questão
During the repolarisation phase of an action potential..
Responda
-
Na+ voltage gates close at -30mV (ICF)
-
Na+ voltage gates open
-
K+ gates opening, allowing K+ to flow out the cell
-
K+ gates close at -90mV (ICF)
-
K+ gates open at -90mV(ICF)
Questão 9
Questão
The electrical signal (action potential) is sent along the axon of a nerve cell
Responda
- True
- False
Questão 10
Questão
What happens to the electrical signal (action potential) when it enters the axon terminal?
Responda
-
It enters the synaptic cleft as neurotransmitters
-
it stays in the axon terminal
-
It changes to a chemical signal
-
Causes an influx of Ca+
-
It continues as an electrical gradient
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