Introduction, Energy, and Phosphagen System Flashcards
the phosphagen system is an ___ ___ of ATP resynthesis
immediate source
PC + ADP ——-> (name enzyme and products)
enzyme: creatine kinase
products: ATP + C
ADP + ADP ——> (name enzyme and products)
enzyme: adenylate kinase
products: ATP + AMP
the phosphagen system reactions occur in the
sarcoplasm
are the phosphagen system reactions aerobic or anaerobic
anaerobic
how much ATP is stored within each kg of skeletal muscle
2.4 mmol
ATP stored in muscle is used how quicly
several seconds
CP concentration is how much higher than ATP
4-6x
the CP reservoir is enough to power what
a sprint for 5-10 seconds
comparison of max rate of energy transfer in phosphagen vs aerobic transfer
The maximum rate of energy transfer is 4-8 times that of aerobic transfer
examples where the phosphagen system is the primary producer of ATP
- 100 m sprint
- shot put
- clean and jerk
- short, explosive activities
primary role of CHO
provide energy for cellular work
what is the only macronutrient that can produce ATP anaerobically
CHO
some CHO must be continually ____
degraded
lipids burn in
a carbohydrate flame
what must happen for strenuous exercise to continue
ATP must be continually resynthesized
anaerobic glycolysis fuel mainly comes from ___ ___ ___ and results in ____ ____
stored muscle glycogen; lactate accumulation
max power output of anaerobic glycolysis compared to ATP-PC
anaerobic = 45% power output of ATP-PC
anaerobic glycolysis ___ ___ until o2 is available
buys time
how is anaerobic glycolysis “reserve fuel”
- used for a long sprint at the end of a race
- longer than a sprint, but still intense, such as a 400 m sprint or 100 yard swim
glycolysis aka
substrate level phosphorlyation
the most rapidly accumulated and highest lactate levels are reached during
all out exercise that lasts 60-180 s
aerobic glycolysis indicates…
the end product is pyruvate, not lactate
the aerobic system primarily utilizes
CHO and fat
aerobic system duration
> 3 min
which energy system has the lowest max power output
aerobic
which energy system has the highest max capacity
aerobic
what happens in the first few minutes of exercise
o2 uptakes rises in an exponential fashion
liver glycogen is esp important for
CNS function
muscle glycogen is esp important for
powering exercise
when does work capacity drop significantly
when muscle glycogen reserves are depleted
