Catalysts increase the rate of a reaction by * 1 point being consumed during the reaction. raising the temperature of the reaction. raising the concentration of the reactants. lowering the activation energy of a reaction.

Muscles helps in the movement, physiology and coordination of the body. The three main types of muscles are skeletal muscles, cardiac muscle and smooth muscle.

The rest period can be created by turning off the stimulator. This causes the decrease in the concentration of ADP, lactic acid and inorganic phosphate. The decrease in the concentration of these molecules will increase the ability of the muscle to increase the maximum tension time. The stimulator must be turned off for the short period of time otherwise the muscle is not allowed to attain the rest period and the body continues from the fatigue.