Resting Membrane Potential Quiz

What is the resting potential of a neuron?

• 30-90 mV

• -30-90 mV

• -30-70 mV

• -70-90 mV

What is the term used to describe a membrane potential that is more positive than the resting potential?

• Depolarization

• Hyperpolarization

• Polarization

• Repolarization

Which ion is more concentrated inside the cell compared to outside in most neurons?

• Sodium (Na+)

• Potassium (K+)

• Chloride (Cl-)

• Organic anions

What type of channels mainly allow potassium (K+) ions to pass?

• Sodium channels

• Chloride channels

• Potassium channels

• Leak channels

What is the main factor that determines the resting membrane potential in neurons?

• Movement of sodium (Na+) ions

• Movement of chloride (Cl-) ions

• Movement of potassium (K+) ions

• Movement of organic anions

What happens when potassium (K+) channels in the membrane open?

• Potassium ions move into the cell

• Chloride ions move out of the cell

• Sodium ions move into the cell

• Potassium ions move out of the cell

What is the primary function of ion channels in the membrane?

• Actively move ions across the membrane

• Create concentration gradients for ions

• Generate electrical signals

• Provide a path for ions to cross the membrane

What is the reference point for measuring membrane potential?

• Inside the cell

• Outside the cell

• New York City

• Boston

What is the term used to describe a membrane potential that is more negative than the resting potential?

• Depolarization

• Hyperpolarization

• Polarization

• Repolarization

What did Luigi Galvani discover about frog's legs?

• They can regenerate

• They can produce electrical signals

• They can kick when stimulated with electricity

• They are resistant to decay