1. The experiment investigates how skeletal muscle maintains ATP levels during contraction by measuring the contraction of thin muscle strips when exposed to ATP, boiled ATP, or glucose solutions. 2. Muscle strips exposed to ATP solution contracted by an average of 2.5%, while those exposed to boiled ATP did not contract, indicating ATP is necessary to cause contraction. 3. Strips exposed to glucose solution contracted slightly, but the experiment could not determine if glucose provided energy for contraction since the muscle was dead tissue lacking metabolic pathways. The results show ATP is required for contraction but do not prove how contraction is energetically sustained in living muscle.