Exam 2 Nutrition UWRF Questions and Answers

What is energy? - ATP (adesinetriphosphate) Energy currency of the body aerobic vs. anaerobic Do not store the energy that is produced. Aerobic - Uses oxygen Krebs Cycle ETC (Electric Transport Chain) Anaerobic - No oxygen PCR Glycolysis P-Cr - Produces ATP Fueled by phosphorus and creatine - Foods that contain creatine (red meat, green leafy vegs - Foods with phosphorus How Long? 10 Seconds Glycolysis - Lactic Acid System Produces ATP - Fueled by Glycogen and Glucose Second Fastest Lasts two minutes.Krebs ETC - Fueled by Glucose/macro-nutrients and oxygen Fat and protein goes through gluconeogenesis Produces ATP Slowest way to generated energy. Intensity - Anerobic - High Aerobic - Low Fat Burning Zone - 55%-70% of max heart rate 220 - age = (<70) 208 * .7 *(age) = What form of Carbohydrates must the body use? - Glucose and glycogen Where do they come from? Food Blood Stream Liver Muscle As exercise intensity increases Release of glucose from liver. As glucose/glycogen depleted, Where do we get energy from? - Aerobic - (Kreb cycle + ETC) = Slowest Anerobic (lactic acid system) = 2nd fastest If we rely on fat, we have to rely on the cycles, not as quick Bonking - During exercise. 99% of glucogen/ energy stores are depleted, Not replenishing carbohydrates.Power - Work / Time Strenuous Exercise - 70-95% VO2 max (Volume oxygen uptake) - Muscle glycogen - Liver glycogen - Depletion - 1 hour workout, 1/2 reserves (start to experience decrease in power) - 2 hours, exhausted Anaerobic Workout? -Especially true! - Liver glycogen and muscle glycogen in working muscle