The Nernst Potential

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Which term is used to describe the diffusion potential across a membrane that opposes the net diffusion of a specific ion?

Nernst potential

What determines the magnitude of the Nernst potential for a specific ion?

Ratio of ion concentrations on both sides of the membrane

What happens to the Nernst potential if the ratio of ion concentrations on both sides of the membrane increases?

It increases

What equation can be used to calculate the Nernst potential for any univalent ion at the normal body temperature of 98.6°F (37°C)?

Nernst equation

What is the net diffusion of an ion when the diffusion potential across the membrane is equal to the Nernst potential for that ion?

Zero

the ______ is determined by the ratio of the concentrations of that specific ion on the two sides of the membrane

Nernst potential

The greater this ______, the greater the tendency for the ion to diffuse in one direction and therefore the greater the Nernst potential required to prevent additional net diffusion.

ratio

The following equation, called the ______, can be used to calculate the Nernst potential for any univalent ion at the normal body temperature of 98.6°F (37°C).

Nernst equation

The ______ potential across a membrane that exactly opposes the net diffusion of a particular ion through the membrane is called the Nernst potential for that ion

diffusion

The diffusion potential across a membrane that exactly opposes the net diffusion of a particular ion through the membrane is called the Nernst potential for ______ ion

any univalent

Test your knowledge on the Nernst potential and its relationship to ion diffusion in this quiz. Explore the factors that determine the magnitude of the Nernst potential and understand its importance in membrane transport.

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