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1. The neuron fires an action potential, sending the electrical signal down the axon.
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∙ 10y ago
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What happens when a resting neuron's membrane depolarizes?
If it is sufficiently depolarized it will fire an action potential A depolarized neuron will successfully pass a message. If you have a polarized neuron will not be able to feel a burn, etc.
A neuron has an altered charge potential?
Depolarized
What happens when a neurons is above its threshold level?
its depolarized.
What are the three main states of a neuron?
polarized, depolarized, repolarized
Does a neuron become depolarized during an inhibitory postsynaptic potential?
False
What triggers at a point in which a neuron will fire?
Threshold
A neuron reaches its trigger point when?
Action potential is nerve impulse triggered when a neuron reaches its threshold, or trigger point for firing. Threshold trigger point for a neuron's firing about negative 50 millivolts.
A neuron fires only when its membrane reaches what?
When it reaches the nerve impulse threshold, the next neuron will fire..
What does it mean when a cell is depolarized?
Depolarization refers to the reversal of charges of neuron cell membrane, it occurs by moving in of 'Na' ions .
What was Excitation and Inhibition about?
Excitation and Inhibition occur in the neurons. Excitation is when a neuron becomes depolarized and fires an action potential. Inhibition is when a neuron becomes hyperpolarized preventing it from firing an action potential.
Which is greater - The extent of membrane polarization at threshold potential or that of the resting membrane potential?
A cell is more depolarized at it's threshold potential than it is at it's resting potential. This is important because a nervous system where a random excitatory post synaptic potential (epsp) would trigger the next neuron would lead to an overly excitable nervous system (btw, this is why caffeine makes you jittery).
What minimum level of a stimiulus required to activate a neuron?
threshold
