AP 1 - Walling - Resting Potential & Action Potential - Ian

What is the typical resting membrane potential of a neuron?

• +70 mV

• 0 mV

• -70 mV

• -30 mV

Which ion is most responsible for establishing the resting membrane potential?

• Sodium (Na⁺)

• Potassium (K⁺)

• Calcium (Ca²⁺)

• Chloride (Cl⁻)

At rest, the inside of the neuron is more __________ compared to the outside.

Tags

NGSS.HS-LS1-3

Which ion tends to leak out of the neuron at rest, helping maintain RMP?

• Chloride (Cl⁻)

• Sodium (Na⁺)

• Potassium (K⁺)

• Calcium (Ca²⁺)

Which structure actively maintains the resting membrane potential?

• Voltage-gated channels

• Ligand-gated channels

• Na⁺/K⁺ pump

• Leak channels

The sodium-potassium pump moves:

• 2 Na⁺ out, 3 K⁺ in

• 3 Na⁺ out, 2 K⁺ in

• 2 Na⁺ in, 3 K⁺ out

• 3 Na⁺ in, 2 K⁺ out

The movement of which ion into the cell would make the inside more positive?

• Potassium (K⁺)

• Sodium (Na⁺)

• Chloride (Cl⁻)

• Phosphate (PO₄³⁻)

Hyperpolarization makes the membrane potential more:

• Positive

• Negative

• Neutral

• Unstable

Which of the following is not directly involved in maintaining the resting membrane potential?

• Leak channels

• Voltage-gated sodium channels

• Na⁺/K⁺ pump

• Potassium channels

Resting membrane potential is essential because it allows cells to:

• Divide

• Communicate via action potentials

• Store oxygen

• Break down nutrients