Exercise Physiology (Energy Systems) Questions and Answers Latest Version 100% Pass

Exercise Physiology (Energy Systems) Questions and Answers Latest Version 100% Pass What is the primary energy source for short, high-intensity activities? The ATP-PC system provides immediate energy for short bursts of activity. How does the body regenerate ATP during exercise? The body uses energy systems like the ATP-PC system, glycolysis, and oxidative phosphorylation to regenerate ATP. What is the role of carbohydrates in energy production during exercise? Carbohydrates are broken down into glucose, which is used in glycolysis to produce ATP. What energy system is primarily used during a 100-meter sprint? The ATP-PC system is the dominant energy system for short, explosive activities like sprints. How does the body produce energy during prolonged exercise? 2 The oxidative system becomes the primary energy source during extended periods of low to moderate intensity exercise. What is lactic acid, and when is it produced? Lactic acid is produced during anaerobic glycolysis when oxygen supply is insufficient to meet energy demands. What happens when glycogen stores are depleted during exercise? The body shifts to using fats as the primary energy source through beta-oxidation. How does the aerobic energy system differ from anaerobic systems? The aerobic system uses oxygen to produce ATP, making it more efficient for sustained activities. What is the primary fuel source during low-intensity, long-duration exercise? Fats are the main energy source during prolonged, low-intensity exercise. How does the body adapt to regular endurance training? 3 The body increases mitochondrial density and improves oxygen delivery and utilization. What is the function of the phosphocreatine (PC) system in energy production? The PC system provides rapid ATP resynthesis for immediate energy needs during short- duration activities. How does glycolysis contribute to energy production? Glycolysis breaks down glucose into pyruvate, producing ATP and NADH in the process. What is the role of the Krebs cycle in energy metabolism? The Krebs cycle produces high-energy electron carriers (NADH and FADH2) for the electron transport chain. How does oxygen availability affect energy systems? Oxygen availability determines whether the body uses aerobic or anaerobic pathways for energy production. What causes muscle fatigue during intense exercise? 4 Muscle fatigue can result from the accumulation of hydrogen ions, leading to a drop in pH and enzyme activity.