Question

All of these factors are involved in establishing the neuron resting membrane potential, except:

a) Ion channels

b) Membrane permeability

c) Active transport pumps

d) Muscle contraction

Answer 1

Muscle contraction does not play a role in establishing the neuron resting membrane potential; instead, ion channels, membrane permeability, and active transport pumps are involved.

Step-by-step explanation:

The factor that is not involved in establishing the neuron resting membrane potential is d) Muscle contraction. Resting membrane potential is determined by ion channels, membrane permeability, and active transport pumps:

• Ion channels allow ions to move across the cell membrane, mainly potassium (K+) and sodium (Na+).
• Membrane permeability refers to the cell membrane's selective allowance of certain ions to pass through, contributing to the charge difference.
• Active transport pumps, such as the sodium-potassium pump, use ATP to move ions against their concentration gradient, maintaining the ion balance that generates the resting potential.

Muscle contraction is related to changes in membrane potential in muscle cells, but it does not play a role in establishing the resting membrane potential in neurons.