Given a scientific question, generate a correct answer to it.

[EX Q]: What concentrates wave energy or disperses it?
[EX A]: wave refraction

[EX Q]: Because action potentials are so brief, a neuron can produce hundreds per what?
[EX A]: second

[EX Q]: The arid environment of a desert, for instance, can quickly deplete an animal of what?
[EX A]:
water