What action will slow down the rate of a reaction?
a. raising the temperature of the reactants
b. decreasing surface area of a solid reactant
c. increasing the concentration of the reactants
d. adding a catalyst to the reaction

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.