Question
Asked Nov 3, 2019

List the characteristics of a local potential versus an action potentials.  Describe where each happens and what type of gates are involved and what is achieved

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Expert Answer

Step 1

Characteristics of a Local potential versus an Action potential are given below in the table:

Action potential
Local potential
Local potential is graded, that means it
vary in voltage according to strength of
the stimulus. A prolonged stimulus opens
more ion gates than a weaker one
They are decremental, that means they
get weaker as spread from the point of
stimulus.
stimulus causes ion channels to open,
results in increased membrane
Generation of action potential follows All
or None principle.
Refractory period lasts from the time
action potential starts until normal
resting potential returns.
It triggered by depolarization. And it is
initiated at an axon hillock.
permeability to sodium (Na), potassium
(K*) or chloride (Ch) ions.
Increased membrane permeability to Na
causes depolarization. While increased
membrane permeability to K* or Clions
causes hyperpolarization.
It understands repolarization,
depolarization, and hyperpolarization.
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Action potential Local potential Local potential is graded, that means it vary in voltage according to strength of the stimulus. A prolonged stimulus opens more ion gates than a weaker one They are decremental, that means they get weaker as spread from the point of stimulus. stimulus causes ion channels to open, results in increased membrane Generation of action potential follows All or None principle. Refractory period lasts from the time action potential starts until normal resting potential returns. It triggered by depolarization. And it is initiated at an axon hillock. permeability to sodium (Na), potassium (K*) or chloride (Ch) ions. Increased membrane permeability to Na causes depolarization. While increased membrane permeability to K* or Clions causes hyperpolarization. It understands repolarization, depolarization, and hyperpolarization.

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Step 2

Local potential: It occur in any region of the cell membrane, however in neurons. It also occurs in specialized regions of synapse involved ...

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