The Immediate Source of Energy for Muscle Contraction is _______

Question

The immediate source of energy for muscle contraction is _______.
A) ATP
B) creatine phosphate
C) glycogen
D) lactic acid

Accepted Answer

ATP is the immediate source of energy for muscle contraction. When ATP is broken down, it releases energy that is used for muscle contraction. Creatine phosphate can also be used to quickly regenerate ATP, but it is not the immediate source of energy. Glycogen is a stored form of carbohydrates that can be broken down into glucose to eventually produce ATP. Lactic acid is a byproduct of anaerobic metabolism and does not directly provide energy for muscle contraction.