instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Sodium-potassium pumps help nerve cells establish a voltage across their plasma membranes.
answer:
Sodium-potassium pumps help nerve cells establish a voltage across their what?


question:
If a gas in a closed area experiences increases in pressure and decreases in temperatures, the volume of the gas will be affected.
answer:
If a gas in a closed area experiences increases in pressure and decreases in temperatures, what other attribute of the gas will be affected?


question:
Children can inherit brown eyes from their parents.
answer:

Which trait can children inherit from their parents?