Understanding Depolarization and Repolarization

What is the primary reason for the outside of a cell membrane being more positively charged compared to the inside?

• The presence of more chloride ions inside the cell

• The presence of more sodium ions outside the cell

• The presence of more calcium ions outside the cell

• The presence of more potassium ions inside the cell

During depolarization, which ion's movement is primarily responsible for making the inside of the cell more positive?

• Sodium ions moving in

• Potassium ions moving out

• Calcium ions moving out

• Chloride ions moving in

What happens to the sodium channels during repolarization?

• They remain open

• They are blocked by potassium ions

• They close

• They become more permeable

Which process occurs when the inside of the cell becomes more negative than the resting membrane potential?

• Repolarization

• Equilibrium

• Depolarization

• Hyperpolarization

What role do potassium channels play in hyperpolarization?

• They close quickly to prevent excess ion movement

• They stay open longer than necessary

• They allow sodium ions to enter the cell

• They block calcium ions from entering the cell