The Muscular System

Muscle Metabolism 1. List the three roles of ATP in muscle contraction: 1. ________________________________ 2. ________________________________ 3. _________________________________ 2. The potential energy in ATP is released when the terminal high-energy bond is broken by a process called ___________________________. Write the end products of this process: ATP (+ H2O) > _________________ 3. Rebuilding ADP into ATP with a new source of energy is carried out by a process called ______________________________. Write the equation for this process: __________________ > ATP (+ H2O) 4.List the three processes used to synthesize additional ATP when ATP supplies are low: 1. _______________________________ 2. _______________________________ 3. _______________________________ 5. An immediate source of energy is _____________________ (CP), but the supplies are limited and rapidly depleted. One molecule of CP produces ___ ATP. 6. Glucose is a major source of energy for synthesizing ATP. List the two sources of glucose: 1. ______________________________ 2. ______________________________ 7. _____________ is the process that breaks down glucose. Name two products of the breakdown of glucose: 1. ________________ 2. _________________ If oxygen is not available, pyruvic acid is converted to __________ acid, which is the end product of _________________ respiration. 8. If oxygen is available, the process is known as ______________ respiration. Name two sources of oxygen: 1. _______________________ 2. _______________________ The aerobic pathway consists of glycolysis + ________________ + ___________________. The net result of one glucose molecule is ___ ATP. 9. The process of restoring the depleted energy reserves after exercise is called _________________.Name four processes that occur during this time: 1. ______________________ 2. ______________________ 3. ______________________ 4. ______________________ 10. Put the following characteristics under the correct fiber type: – Krebs cycle and oxidative phosphorylation – fatigue rapidly – few capillaries – much myoglobin – long-distance runner – light in color—large diameter Red Slow-Twitch Fibers – uses glycolysis – high endurance – many capillaries – little myoglobin – sprinter – red in color—small diameter White Fast-Twitch Fibers

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