PART - 2 - Unit V : CH - 17 Locomotion and Movement — BIOLOGY STD 11 Science — Question

The energy source for muscle contraction is obtained through ATP (Adenosine Triphosphate). During contraction, the conversion of ADP back into ATP occurs with the assistance of creatine phosphate. The synthesis of ATP in muscles occurs through the oxidation of stored glycogen and obtained glucose and fatty acids. Myoglobin in red muscles stores oxygen which aids in ATP production. Prolonged contraction causes the accumulation of lactic acid in muscles due to anaerobic conditions, leading to muscle pain.