When you are frightened by something, what part of the brain directs your body to react by making your heart beat faster and increasing your blood pressure? a. cerebellum b. left hemisphere c. medulla d. right hemisphere

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?