Question

when a neuron is at its resting potential view available hint(s)for part a when a neuron is at its resting potential sodium-potassium pumps transport sodium ions into the cell. sodium-potassium pumps transport both sodium and potassium ions out of the cell. gated sodium channels are open. there are more potassium ions inside the neuron than outside. the inside of the cell is positively charged relative to the outside.

Answer 1

When a neuron is not producing an electrical signal, it is at rest. During this period, the neuron's inside is negatively correlated with its exterior.

Once the sodium channels open, the neuron totally depolarizes to a membrane potential of about +40 mV. Action potentials are referred to as "all-or-nothing" occurrences because, once the threshold potential is reached, the neuron always completely depolarizes. Most animal cells have a negative resting membrane potential because their interiors are more negatively charged than their exteriors. The resting membrane potential can only be accurately described in this way.

Na+ is drawn to the inside of dormant neurons by two different mechanisms. The high concentration of Na+ outside the cell initially pushes Na+ down the gradient of concentration into the cell. Second, the negative charge of the neuron creates an electrical gradient that tends to pull the positively charged ion within the cell.

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