EXPH 38 Exam 2
the contributions from various pathways of energy metabolism are dependent upon what - Answer-
intensity and duration of the exercise and the fitness level of the individual
what system is the fastest way to make ATP - Answer-The ATP-CP system
is the ATP-CP system aerobic or anaerobic - Answer-anaerobic
what is very limited in the muscle in the ATP and CP system - Answer-high energy phosphate
how much ATP is provided in the ATP-CP system - Answer-3-8 mmol of ATP per kg of muscle (4-5 times
more PCr)
the ATP produced in the ATP-CP system is enough to do what type of activity - Answer-enough to walk
briskly for 1 minute, run cross-country race for 20-30 seconds, or perform all-out exercise (sprint) for
approximately 5-8 seconds
the maximum rate of energy transfer in the ATP-CP system from the intramuscular high-energy
phosphate exceeds what - Answer-exceeds by 4-8 times the maximal energy transfer from aerobic
metabolism
,in order to sustain exercise or recover from short all-out effort what must happen - Answer-we must
have a secondary energy source to replenish the ATP
the energy to replace high-energy phosphates during strenuous activity in ATP-CP system comes
primarily from where - Answer-glucose and stored glycogen during the anaerobic process of glycolysis
the glucose and glycogen during the anaerobic process of glycolysis that causes the high-energy
phosphates to be replaced during strenuous activity in the ATP-CP system primarily forms what -
Answer-lactic acid
when are the most rapid accumulated highest lactic acid levels reached - Answer-maximal exercise
how long can maximal exercise be sustained - Answer-for 60-180 seconds
what are the metabolic fates of lactic acid? - Answer-can be transported to liver to go through the Cori
cycle, go back to glucose to put in blood and muscle fibers can also use glucose source
does blood lactate accumulate at all levels of exercise - Answer-no
in an untrained person's maximal aerobic capacity what percentage does their blood lactate accumulate
and rise in an exponential fashion - Answer-50-55%
for a trained individual the threshold for lactate buildup occurs how - Answer-at a higher percentage of
the athlete's aerobic capacity
why is a trained individual's threshold for lactate buildup at a higher percentage - Answer--genetic
endowment (type of muscle fiber)
-adaptations that cause less lactic acid production
, -Greater rate of removal
what is another term for threshold for lactate - Answer-anaerobic threshold or blood lactate threshold
adaptations and increased removal of the threshold for lactate buildup may be caused by what -
Answer--increased capillary density
-increased number and size of mitochondria
-increase in aerobic enzymes and transfer agents
the adaptations of threshold for lactate buildup serve to what - Answer-to increase the cells' capacity to
generate ATP aerobically and delay the onset of blood lactate accumulation
trained athletes can often perform at what percent of maximal capacity for aerobic metabolism before
significant increases in blood lactate occur - Answer-80-90%
it is believed that training might enhance the ability to do what - Answer-utilize lactic acid formed in
one part of a working muscle by other fibers in the same muscle or other less active tissues (or by the
muscle fiber itself)
the ATP-CP system is an important means of what - Answer-glucose conservation
what type of athletes have a higher lactate producing capacity - Answer-power/sprint athletes
after well-trained athletes perform maximal short-term exercise their blood lactate levels are what %
more or less than untrained subjects - Answer-20-30% higher
why can well trained athletes perform with a higher % lactate levels than those who are untrained -
Answer--more fast-twitch muscle fibers
the contributions from various pathways of energy metabolism are dependent upon what - Answer-
intensity and duration of the exercise and the fitness level of the individual
what system is the fastest way to make ATP - Answer-The ATP-CP system
is the ATP-CP system aerobic or anaerobic - Answer-anaerobic
what is very limited in the muscle in the ATP and CP system - Answer-high energy phosphate
how much ATP is provided in the ATP-CP system - Answer-3-8 mmol of ATP per kg of muscle (4-5 times
more PCr)
the ATP produced in the ATP-CP system is enough to do what type of activity - Answer-enough to walk
briskly for 1 minute, run cross-country race for 20-30 seconds, or perform all-out exercise (sprint) for
approximately 5-8 seconds
the maximum rate of energy transfer in the ATP-CP system from the intramuscular high-energy
phosphate exceeds what - Answer-exceeds by 4-8 times the maximal energy transfer from aerobic
metabolism
,in order to sustain exercise or recover from short all-out effort what must happen - Answer-we must
have a secondary energy source to replenish the ATP
the energy to replace high-energy phosphates during strenuous activity in ATP-CP system comes
primarily from where - Answer-glucose and stored glycogen during the anaerobic process of glycolysis
the glucose and glycogen during the anaerobic process of glycolysis that causes the high-energy
phosphates to be replaced during strenuous activity in the ATP-CP system primarily forms what -
Answer-lactic acid
when are the most rapid accumulated highest lactic acid levels reached - Answer-maximal exercise
how long can maximal exercise be sustained - Answer-for 60-180 seconds
what are the metabolic fates of lactic acid? - Answer-can be transported to liver to go through the Cori
cycle, go back to glucose to put in blood and muscle fibers can also use glucose source
does blood lactate accumulate at all levels of exercise - Answer-no
in an untrained person's maximal aerobic capacity what percentage does their blood lactate accumulate
and rise in an exponential fashion - Answer-50-55%
for a trained individual the threshold for lactate buildup occurs how - Answer-at a higher percentage of
the athlete's aerobic capacity
why is a trained individual's threshold for lactate buildup at a higher percentage - Answer--genetic
endowment (type of muscle fiber)
-adaptations that cause less lactic acid production
, -Greater rate of removal
what is another term for threshold for lactate - Answer-anaerobic threshold or blood lactate threshold
adaptations and increased removal of the threshold for lactate buildup may be caused by what -
Answer--increased capillary density
-increased number and size of mitochondria
-increase in aerobic enzymes and transfer agents
the adaptations of threshold for lactate buildup serve to what - Answer-to increase the cells' capacity to
generate ATP aerobically and delay the onset of blood lactate accumulation
trained athletes can often perform at what percent of maximal capacity for aerobic metabolism before
significant increases in blood lactate occur - Answer-80-90%
it is believed that training might enhance the ability to do what - Answer-utilize lactic acid formed in
one part of a working muscle by other fibers in the same muscle or other less active tissues (or by the
muscle fiber itself)
the ATP-CP system is an important means of what - Answer-glucose conservation
what type of athletes have a higher lactate producing capacity - Answer-power/sprint athletes
after well-trained athletes perform maximal short-term exercise their blood lactate levels are what %
more or less than untrained subjects - Answer-20-30% higher
why can well trained athletes perform with a higher % lactate levels than those who are untrained -
Answer--more fast-twitch muscle fibers
