SCIENCE
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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when the inside of the cell is more negative than outside
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when the inside of the cell is more positive than outside
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Either A or B
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None of the above
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Detailed explanation-1: -If the membrane potential becomes more positive than it is at the resting potential, the membrane is said to be depolarized. If the membrane potential becomes more negative than it is at the resting potential, the membrane is said to be hyperpolarized.
Detailed explanation-2: -A neuron at rest is negatively charged: the inside of a cell is approximately 70 millivolts more negative than the outside (−70 mV, note that this number varies by neuron type and by species).
Detailed explanation-3: -This means that the interior of the cell is negatively charged relative to the outside. Hyperpolarization is when the membrane potential becomes more negative at a particular spot on the neuron’s membrane, while depolarization is when the membrane potential becomes less negative (more positive).
Detailed explanation-4: -Resting Membrane Potential A neuron is at rest when it is not sending an an electrical signal. During this time, the inside of the neuron is negative relative to the outside.
Detailed explanation-5: -When the neuronal membrane is at rest, the resting potential is negative due to the accumulation of more sodium ions outside the cell than potassium ions inside the cell.