EXPH 386 Exam 2 Full Set Questions
And Correct Answers Updated
What are the contributions from secondary energy metabolism pathways
dependent on? - Ans--Intensity and duration of the exercise. Also the
fitness level of the individual
About how much ATP and PCr is stored within the muscle? - Ans--~ 3-8
mmol of ATP per kg of muscle. PCr is 4-5 times higher than ATP.
Aerobic Metabolism pathways - Ans--Requires oxygen. Krebs, Beta-
oxidation, and Electron Transport Chain
Where does the energy to replace the high-energy phosphates during
strenuous exercise come from? - Ans--Glucose and stored glycogen from
the anaerobic pathway of glycolysis
What does the anaerobic process of glycolysis primarily result in? - Ans--
Formation of lactic acid
What is the fastest way to generate energy after using ATP and CP? - Ans--
glycolysis
Why is glycolysis a disadvantage in generating energy after using ATP and
CP - Ans--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? - Ans--No,
only in higher amounts during higher intensity exercises.
When is the most rapidly accumulated and highest lactic acid levels
reached? - Ans--During maximal exercise that can be sustained for 60-180
seconds
, High intensity but short duration workouts require what - Ans--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 - Ans--decrease in lactate accumulation and overall blood
lactic levels
What are other names for the threshold for lactic build up? - Ans--anaerobic
threshold or blood lactate threshold
Factors that relate to lactate threshold - Ans--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 ________
___________ _____ _________ ____________ _____________
__________ - Ans--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 - Ans--genetic
endowment
adaptions that cause less lactic acid production
greater rate of removal
Adaptions and increased removal of lactate may be caused by? - Ans--
increased capillary density
increased number and size of the mitochondria
increase in aerobic enzymes and transfer agents
Trained athletes can often perform at what percentage of their maximal
capacity for aerobic metabolism before significant increases in blood
lactate occur? - Ans--80-90%
After a well-trained athlete performs maximal short-term exercise, where
are their blood lactate levels compared to an untrained subject - Ans--20-
30% higher
And Correct Answers Updated
What are the contributions from secondary energy metabolism pathways
dependent on? - Ans--Intensity and duration of the exercise. Also the
fitness level of the individual
About how much ATP and PCr is stored within the muscle? - Ans--~ 3-8
mmol of ATP per kg of muscle. PCr is 4-5 times higher than ATP.
Aerobic Metabolism pathways - Ans--Requires oxygen. Krebs, Beta-
oxidation, and Electron Transport Chain
Where does the energy to replace the high-energy phosphates during
strenuous exercise come from? - Ans--Glucose and stored glycogen from
the anaerobic pathway of glycolysis
What does the anaerobic process of glycolysis primarily result in? - Ans--
Formation of lactic acid
What is the fastest way to generate energy after using ATP and CP? - Ans--
glycolysis
Why is glycolysis a disadvantage in generating energy after using ATP and
CP - Ans--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? - Ans--No,
only in higher amounts during higher intensity exercises.
When is the most rapidly accumulated and highest lactic acid levels
reached? - Ans--During maximal exercise that can be sustained for 60-180
seconds
, High intensity but short duration workouts require what - Ans--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 - Ans--decrease in lactate accumulation and overall blood
lactic levels
What are other names for the threshold for lactic build up? - Ans--anaerobic
threshold or blood lactate threshold
Factors that relate to lactate threshold - Ans--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 ________
___________ _____ _________ ____________ _____________
__________ - Ans--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 - Ans--genetic
endowment
adaptions that cause less lactic acid production
greater rate of removal
Adaptions and increased removal of lactate may be caused by? - Ans--
increased capillary density
increased number and size of the mitochondria
increase in aerobic enzymes and transfer agents
Trained athletes can often perform at what percentage of their maximal
capacity for aerobic metabolism before significant increases in blood
lactate occur? - Ans--80-90%
After a well-trained athlete performs maximal short-term exercise, where
are their blood lactate levels compared to an untrained subject - Ans--20-
30% higher
