The function of transverse tubules (T-tubules) is to a) rapidly conduct action potentials to the interior of the muscle fiber Ob) conduct ATP molecules out of the mitochondria throughout the sarcoplasm Oc) break down acetylcholine in the neuromuscular junction O d) inhibit the interaction between actin and myosin e) store Ca2+ ions inside the muscle fiber You want to sprint 40 meters as fast as possible, which will take you between 5-7 seconds. Which of these energy sources and fiber type will you primarily rely on? a) Aerobic respiration and type 1 fibers b) Phosphocreatine and type 1 fibers O c) Anaerobic glycolysis and type 1 fibers d) Anaerobic glycolysis and type 2X fibers Oe) Phosphocreatine and type 2x fibers

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