Question

For a neuron with an initial membrane potential at -70 mV, an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the

Answer 1

The potassium ions are positively charged(cations) if the charge is -70mV the outflow of cations will cause a decrease in the potential. The potential will become lower than -70mV.

Answer 2

The given condition of an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the hyperpolarization of the neuron.

Hyperpolarization is a change in a cell's membrane potential becomes more negative at a particular spot on the neuron's membrane

• A hyperpolarization is an event or stage that takes place when some potassium channels remain open and sodium channels reset.
• The sodium-potassium pump keeps the concentrations of Na+ and K+ at constant disequilibrium to set the membrane potential of neurons.
• Increased potassium movement leads to more potassium ions out of that neuron's cytoplasm.
• It can be seen as a slight dip following the spike.

Thus, the correct answer would be the hyperpolarization of the neuron.

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