Podcast
Questions and Answers
Which term is used to describe the diffusion potential across a membrane that opposes the net diffusion of a specific ion?
Which term is used to describe the diffusion potential across a membrane that opposes the net diffusion of a specific ion?
- Diffusion potential
- Net potential
- Membrane potential
- Nernst potential (correct)
What determines the magnitude of the Nernst potential for a specific ion?
What determines the magnitude of the Nernst potential for a specific ion?
- Temperature of the environment
- Ratio of ion concentrations on both sides of the membrane (correct)
- Size of the membrane
- Concentration of other ions
What happens to the Nernst potential if the ratio of ion concentrations on both sides of the membrane increases?
What happens to the Nernst potential if the ratio of ion concentrations on both sides of the membrane increases?
- It increases (correct)
- It remains the same
- It becomes negative
- It decreases
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)?
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)?
What is the net diffusion of an ion when the diffusion potential across the membrane is equal to the Nernst potential for that ion?
What is the net diffusion of an ion when the diffusion potential across the membrane is equal to the Nernst potential for that ion?
the ______ is determined by the ratio of the concentrations of that specific ion on the two sides of the membrane
the ______ is determined by the ratio of the concentrations of that specific ion on the two sides of the membrane
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.
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.
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).
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).
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
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
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
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
