Which of the following does NOT describe graded potentials?They are changes to the membrane potential.They vary with the intensity of the stimulus.They are local changes.They are always depolarizing.
Question
Which of the following does NOT describe graded potentials?They are changes to the membrane potential.They vary with the intensity of the stimulus.They are local changes.They are always depolarizing.
Solution
The statement that does NOT describe graded potentials is "They are always depolarizing."
Graded potentials can be either depolarizing or hyperpolarizing. Depolarizing graded potentials occur when positive ions enter the cell, making the inside more positive or less negative. Hyperpolarizing graded potentials occur when positive ions leave the cell or negative ions enter the cell, making the inside more negative. Therefore, the claim that graded potentials are always depolarizing is incorrect.
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