Equilibrium and Membrane Potentials Quiz

Which equation accounts for both the chemical and electrical driving forces that act on an ion?

What will be the direction of an ion when the membrane potential is at its equilibrium potential?

What generates the resting membrane potential?

Which equation is used to understand the basis of membrane potential in reference to ion permeabilities?

What type of conduction is characterized by passive, local, graded potentials?

Which type of conduction is associated with myelinated axons and is a solution to energy and speed issues?

What accounts for the absolute refractory period during action potential propagation?

Which mechanism turns different kinds of stimuli into action potentials in the nervous system?

What is the consequence of demyelinating diseases on action potential propagation frequency?

What determines the size of a graded potential?

What type of potential is responsible for coding intensity in sensory systems?

Which type of conduction is characterized by a decrease in action potential propagation frequency in demyelinating diseases?

Ion Movement and Membrane Potential

The Goldman equation accounts for both the chemical and electrical driving forces that act on an ion.
When the membrane potential is at its equilibrium potential, the direction of an ion is zero, meaning there is no net movement of ions.

Generation of Resting Membrane Potential

The resting membrane potential is generated by the unequal distribution of ions across the cell membrane.

Ion Permeabilities and Membrane Potential

The Goldman-Hodgkin-Katz equation is used to understand the basis of membrane potential in reference to ion permeabilities.

Conduction Types

Electrotonic conduction is characterized by passive, local, graded potentials.
Saltatory conduction is associated with myelinated axons and is a solution to energy and speed issues.

Action Potential Propagation

The absolute refractory period during action potential propagation is accounted for by the inactivation of sodium channels.

Mechanisms of Action Potentials

The transduction mechanism turns different kinds of stimuli into action potentials in the nervous system.

Effects of Demyelination

Demyelinating diseases result in a decrease in action potential propagation frequency.
In demyelinating diseases, the consequence is a decrease in action potential propagation frequency.

Graded Potentials

The size of a graded potential is determined by the strength of the stimulus.
Graded potentials are responsible for coding intensity in sensory systems.

Test your understanding of equilibrium and membrane potentials in this quiz. Topics covered include defining electrochemical equilibrium, equilibrium potential, and writing the simplified Nernst equation. Prepare to demonstrate your knowledge of internal and external ion concentrations.