Your nervous system interacts with every other systems in your body. Your endocrine system works closely with your brain and central nervous system to control the creation of specific hormones and enzymes. Your digestive and excretory systems work with the nervous system in both conscious and unconscious ways.
The independent is the amount of time you do sit-ups the dependant is your heart rate because it will speed up
the control is how much effort that you put out doing sit ups
Answer:
D
Explanation:
Enzymes are chemical catalysts they speed up/ increase the rate of the reaction by lowering the activation energy (minimum energy required for reaction to actually occur).
