An Action Potential in a Neuronal Membrane Differs from a Graded

question 72

Multiple Choice

An action potential in a neuronal membrane differs from a graded potential in that

• A)An action potential requires the opening of Ca⁺² channels, whereas a graded potential does not
• B)An action potential is propagated without decrement, whereas a graded potential is not
• C)An action potential has a threshold and is an all-or-none phenomenon, whereas a graded potential does not have a threshold and is not all-or-none
• D)Both an action potential requires the opening of Ca⁺² channels, whereas a graded potential does not and an action potential is propagated without decrement, whereas a graded potential is not are correct
• E)Both an action potential is propagated without decrement, whereas a graded potential is not and an action potential has a threshold and is an all-or-none phenomenon, whereas a graded potential does not have a threshold and is not all-or-none are correct

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