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33 Cards in this Set
- Front
- Back
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stored ATP is the main source of energy for
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muscle fiber contraction
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ATP is needed for myosin head ____ & ____
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attachment - detachment
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muscles can only store enough ATP to last
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4-6 seconds
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ATP must be continually ____ to sustain a muscle contraction
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recycled
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three pathways that a muscle can use to generate ATP
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phosphorylation - anaerobic glycolysis - aerobic respiration
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phosphorylation of ADP by
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creatine phosphate
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anaerobic glycolysis is with
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lactic acid fermentation
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in aerobic respiration body uses about ____ of this
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90%
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creatine phosphate is a ____ ____ molecule stored in muscles
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high energy
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creatine phosphate contains a high energy ____ bond
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phosphate
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energy stored in creatine phosphate is transferred to ADP to reform
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ATP
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phosphorylation is the transfer of a ____ ____ and ____ associated with it
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phosphate group - energy
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3 things happen in phosphorylation when ATP is depleted in a muscle cell
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creatine phosphate couples with ADP - phosphate + energy transferred to ADP - ADP to ATP
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creatine phosphate reserves are depleted in ____ seconds
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15-20
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creatine phosphate reserves ____ during inactivity
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replenish
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in aerobic respiration glucose is broken down with the use of ____ to release ____
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oxygen - energy
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in aerobic respiration energy is used to form
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ATP
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in aerobic respiration glucose is broken down into
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carbon dioxide and water
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the process of aerobic respiration requires continuous ____ & ____
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oxygen and nutrients
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where in the muscle cell does most of the process occur
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mitochondria
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how fast is the process of aerobic respiration
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fairly slow
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most of the energy during prolonged exercise, must come from this
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aerobic respiration
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what is the net gain of aerobic respiration
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36 ATP
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in aerobic respiration glucose + oxygen form
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carbon dioxide + water+ ATP
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what is the first step of both aerobic respiration & lactic acid formation
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glycolysis
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in glycolysis glucose is split into
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2 pyruvic acid molecules
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what is the total atp gained from glycolysis
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2
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in anaerobic glycolysis if oxygen is available the pyruvic acid continue to be broken down by ____ by ____ ____
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mitochondria - aerobic respiration
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in anaerobic glycolysis if oxygen in NOT available the pyruvic acids are converted to ____ ____
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lactic acid
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anaerobic glycolysis provides energy for how long
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30-60 seconds
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anaerobic glycolysis is an ____ energy source
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inefficient
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in anaerobic glycolysis there are ____ amounts of ____ and ____ amounts of ____ out
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large - glucose - small - atp
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in anaerobic glycolysis ____ ____ & ____ may result
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muscle fatigue - soreness
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