The answer is C. The missing product (A) is water an it combines with carbon dioxide and light to produce glucose (B).
Similar to the other types of muscle, smooth muscle contraction is caused by the sliding of myosin and actin filaments over each other. Calcium initiates contractions in a different way in a smooth muscle than in a skeletal muscle.
Smooth muscles use less energy to generate the given amount of force, can substain contractile force without fatigue & uses calcium from the sarcoplasic reticulum & extracellular space.
Organs are made up of many tissues
It would be uable to defend itself.
