1. Myoglobin- protein carries small amt of oxygen.
Function: to store excess oxygen within the muscle cell, to help buffer supply during periods of excessive demand. (Even with help from the myoglobin, it's often that muscles have to resort to anaerobic metabolism under strenuous exercise, during which lactic acid is built up and released into the blood stream).
2. Lactic Acid- used in sprints/bursts of energy when oxygen is not readily available
3. Creatine- stores ATP, can quickly hand it over for use
What are the 3 ways of energy for contraction?