What happens to a person's body during times of stress?
cortisol increases.
heart rate decreases.
breathing increases.
permanent amnesia kicks in.
adrenaline decreases.
the immune system receives a temporary boost.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?