Graded membrane potentials:Help determine whether a neuron will reach thresholdRely heavily on voltage gated ion channelsAre excitatory when they make membrane potential more negativeAre excitatory when they hyperpolarise the cell
Question
Graded membrane potentials:Help determine whether a neuron will reach thresholdRely heavily on voltage gated ion channelsAre excitatory when they make membrane potential more negativeAre excitatory when they hyperpolarise the cell
Solution
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Graded membrane potentials do help determine whether a neuron will reach threshold. They are small changes in membrane potential that occur in response to stimuli. If the sum of these potentials is large enough, it can trigger an action potential, or "threshold."
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Graded membrane potentials do not rely heavily on voltage-gated ion channels. Instead, they primarily rely on ligand-gated or mechanically-gated ion channels. Voltage-gated channels are more involved in action potentials.
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Graded potentials are not necessarily excitatory when they make the membrane potential more negative. This is actually a hyperpolarizing graded potential
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