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6. STIMULI
Muscle Contraction
Energy
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ATP-PCr system
BIOLOGY > 6. STIMULI > Muscle Contraction > Energy
12 cards
Cards (20)
what is used up very quickly and why??
So much energy is needed when muscles contract so
ATP
used up very quickly
ATP must be
continually
regenerated so exercise can continue
What are the 3 main ways
ATP
can be continually regenerated?
aerobic respiration
anaerobic respiration
ATP-Phosphocreatine (PCr)
System
How is most
ATP
generated?
Via
oxidative phosphorylation
in the cells
mitochondria
aerobic respiration
Aerobic
respiration
only works when what?
When there is
oxygen
, so it is good for long periods of low-intensity exercise
What happens in
anaerobic respiration
?
ATP
made RAPIDLY by
GLYCOLYSIS
What is the end product of
glycolysis
(
anaerobic respiration
)?
Pyruvate
, which is converted to lactate by
LACTATE FERMENTATION
issues with
lactate
-
anaerobic respiration
?
lactate can quickly build up in the muscles and cause
MUSCLE FATIGUE
What is
anaerobic respiration
good for?
Short periods of hard exercise
eg
400m
sprint
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