Resting Membrane Potential is the difference across plasma membranes expressed in millivolts
Resting Membrane Potential is determined by..
Permeability to Na+ and K+
Permeability to Na+ and Ca+
Permeability to K+ and Ca+
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.
When Na+ concentration inside the cell is low, the cell will
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
Resting membrane potential is -70mV
An Action Potential occurs when a threshold point of -40mV is reached
When an action potential begins, ❌ occurs, causing ❌ voltage gates to open and allow Na+ to flow ❌ the cell.
During the repolarisation phase of an action potential..
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)
The electrical signal (action potential) is sent along the axon of a nerve cell
What happens to the electrical signal (action potential) when it enters the axon terminal?
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
