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EXPH 386 Exam 2 Questions and Answers
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EXPH 386 Exam 2 Questions and Answers
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EXPH 386 Exam 2What are the contributions from secondary energy metabolism pathways dependent on? - Answer-
Intensity and duration of the exercise. Also the fitness level of the individual
About how much ATP and PCr is stored within the muscle? - Answer-~ 3-8 mmol of ATP per kg of
muscle. PCr is 4-5 times higher than ATP.
Aerobic Metabolism pathways - Answer-Requires oxygen. Krebs, Beta-oxidation, and Electron Transport
Chain
Where does the energy to replace the high-energy phosphates during strenuous exercise come from? -
Answer-Glucose and stored glycogen from the anaerobic pathway of glycolysis
What does the anaerobic process of glycolysis primarily result in? - Answer-Formation of lactic acid
What is the fastest way to generate energy after using ATP and CP? - Answer-glycolysis
Why is glycolysis a disadvantage in generating energy after using ATP and CP - Answer-using glycolysis
increases the lactate/pyruvate ratio which means more lactic acid is produced. Glycolysis is also very
inefficient resulting in only 2 ATP
, Does lactic acid appear in the blood during all types of exercise? - Answer-No, only in higher amounts
during higher intensity exercises.
When is the most rapidly accumulated and highest lactic acid levels reached? - Answer-During maximal
exercise that can be sustained for 60-180 seconds
High intensity but short duration workouts require what - Answer-immediate energy which comes from
ATP and PCr
Lowering the intensity of a workout to be able to sustain a longer duration results in what - Answer-
decrease in lactate accumulation and overall blood lactic levels
What are other names for the threshold for lactic build up? - Answer-anaerobic threshold or blood
lactate threshold
Factors that relate to lactate threshold - Answer-low tissue oxygen
reliance on glycolysis
activation of fast twitch muscle fibers
reduced lactate removal
for a trained individual, the threshold for lactate build up occurs at ________ ___________ _____
_________ ____________ _____________ __________ - Answer-a higher percentage of the athletes
aerobic capacity
what are some possibilities for the threshold for lactate build up occurring at a higher percentage of the
athletes aerobic capacity due to - Answer-genetic endowment
adaptions that cause less lactic acid production
greater rate of removal
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