Which of the following does not contribute to the cell's membrane potential?

a. Permeability to K+

b. Permeability to Na+

c. The overall resistance of the membrane

d. Electrogenic ion pumps

e. None of the above; all contribute to membrane potentials.

What are two ways that the temperature inside spacecraft is kept at a safe level for the crew upon re-entry?

How does the chance of a coin landing on each side compare to the chance that a gamete cell will receive a particular gene at meiosis?

What the green pigment in plants are called?

A scientist tracked the summer eating habits of brown bears. His results are shown in the graph below. If the brown bears' reliance on leaves increased by 14 percent, how would the combined total of all the percentages be affected?

What structures are included in the level or organization called cells?

What causes the movement of calcium and sodium ions in and out of cardiac cells?

if research is restricted. then the new discoveries made are limited. which action is most likely to increase the number of discoveries scientist can make?

Which statement about nuclear fission is false? a: nuclear fission takes place in the core of the stars b: the fuel for nuclear fission is often uranium c: nuclear fission releases large amount of energy d: nuclear fission is used to generate

Some monkey flowers (Mimulus guttatus) living near the sites of copper mines can grow in soil containing high concentrations of copper, which is toxic to most plants. Copper tolerance is a heritable trait. Select the three statements that are true.

The lowest level of environmental complexity that includes both living and nonliving factors is the A: Biome B: Community C: Ecosystem D: Biosphere