Quiz on Membrane Potential of Cells

What is the typical resting membrane potential for various cell types?

• -50 mV to -60 mV

• -70 mV to -80 mV

• -90 mV to -100 mV

• -30 mV to -40 mV

Which mechanism actively transports Na+ out of the cell?

• Na+/K+ ATPase pump

• Voltage-gated channels

• Ion diffusion

• Passive transporters

What does the Nernst equation calculate?

• Action potential threshold

• Equilibrium potential for a specific ion

• Membrane capacitance

• Resting membrane potential

Which ion is typically found in higher concentration inside the cell?

• K+

• Cl-

• Ca2+

• Na+

What is the role of ion channels in membrane potential?

• To block ion movement

• To allow specific ions to diffuse

• To stabilize the membrane

• To create energy

What is the Donnan potential typically generated by?

• Permeable ions

• Non-permeable charged macromolecules

• Ion pumps

• Active transport mechanisms

What does the Goldman-Hodgkin-Katz equation account for?

• Single ion permeability

• Ion channel density

• Multiple permeant ions

• Membrane thickness

What is the significance of membrane potential in neurons?

• Regulating cell size

• Controlling cell division

• Enabling rapid signal transmission

• Facilitating nutrient absorption

What is the typical resting membrane potential of red blood cells?

• -50 mV

• +11 mV

• -80 mV

• -70 mV

What does selective permeability of the membrane influence?

• Ion concentration gradients

• Cell division

• Osmotic pressure

• Cell migration