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What happens if the presynaptic membrane of a motor neuron suddenly becomes permeable to calcium ion?
Wiki User
∙ 9y ago
The motor end plate will be depolarized.
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The motor end plate will be depolarized.
Wiki User
∙ 9y ago
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When a sodium channel opens and sodium rushes into a myocyte the cell membrane becomes?
The cell becomes depolarized
Which is true of drugs that decrease membrane permeability to sodium ions?
It would decrease the probability of generating a nerve impulse. When a neuron is activiated by a threshold stimulus, the membrane briefly becomes more permeable to sodium. If the permeability is decreased, it will be more difficult for the sodium ions to rush into the cell.
What suddenly changes Earth's crust?
The existing layer will aventually sink and when a volcano or something erupts, it becomes solid and replaces the old crust.
What will happen if the earth becomes flat?
If the spherical Earth as we know it suddenly became flat, it would stop rotating, and the Sun and cosmic radiation would eventually destroy it.
When soil becomes more liquid it becomes what?
mud
What is the effect of heat on beetroot?
The effect of heat on beetroot is that the membrane becomes impacted. It causes the membrane to be more permeable.
When a nerve is activated by a threshold stimulus the membrane becomes more permeable to?
Potassium and Sodium
What would happen to the membrane potential if a substance that makes the membrane permeable to ions is added to the cell?
If a subsance is applied to a cell that makes the membrane more permeable to ions, the interior voltage changes. If the interior voltage becomes more positive (say from Ð70 mV to Ð60 mV), this is called a depolarization. If the interior voltage becomes more negative (say from Ð70 mV to Ð80 mV) it's called a hyperpolarization.
Is the cell membrane permeable to ethanol?
Ethanol is a type of alcohol and alcohol breaks apart the weak hydrogen bonds in the lipid bilayers of cell membranes, which in turn, means it's denaturing. Once a membrane denatures, it no longer has a function so it becomes more permeable and it's less selective.
What would happen if the cell wasn't permeable?
the cell membrane is not completely permeable.This allows substances in and out of the cell and only a few substances could get into the cell.If the cell membrane becomes permeable any substance including the bad ones will get in easily this could destroy the cell.
What does the term reversal of fortune mean?
It referrers to when a poor person suddenly becomes rich; or a rich person suddenly becomes poor.
What is membrane gelling?
Membrane gelling is when a membrane becomes solid, for example at low temperatures.
WOULD A SUBSTANCE THAT DECREASES MEMBRANE PROBABILITY TO SODIUM INCREASE OR DECREASE THE PROBABILITY OF GENERATING A NERVE IMPULSE?
It would decrease the probability of generating a nerve impulse. When a neuron is activiated by a threshold stimulus, the membrane briefly becomes more permeable to sodium. If the permeability is decreased, it will be more difficult for the sodium ions to rush into the cell.
If a resting potential becomes more negative what happens to the cell?
When the membrane potential becomes more negative it is being hyperpolarized. Remember the resting membrane potential is already at a negative state (~70mV). So if you are making a comparison of a membrane potential that is hyperpolarized in comparison to a resting membrane potential, the resting membrane potential is said to be more depolarized.When the membrane potential becomes more positive it is called depolarization.
What is the meaning of apere?
Suddenly becomes visible. Appear.
When the cell membrane becomes a vesicle?
endocytosis
What happens when a neuron is stimulated by another neuron?
The cell membrane becomes more permeable to the sodium potassium ions.
