The nervous system produces a response in your body in about 10 seconds.
true or false?

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?