agonist shortens (lengthens) dependant on the demand of movement
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Isometric contraction
muscles length remains the same
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concentric
agonist shortens (contracts) and the antagonist lengthens (relaxes)
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eccentric
agonist lengthens and antagonist shortens as it relaxes
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Type 1 slow twitch muscles fibres
suited for long distance events such as marathons as they have a high resistance to fatigue and the characteristics to respire aerobically
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Type 2a fast oxidative glycolytic muscle fibres
suited to events which require both aerobic and anaerobic respiration. These muscle fibres can also be trained to be tyoe 1 or 2b as they have the characteristics for both e.g. 1500m
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Type 2b fast glycolytic muscle fibres
used for fast explosive burst of energy as they have high stores of PC and glycogen allowing anaerobic respiration e.g. 110m hurdles
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Heart rate
The number of ventricles contractions in one minute
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Stroke volume
blood ejected from heart ventricles every beat
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Cardiac Output
amount of blood ejected from the heart ventricles in one minute
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The hearts ability to fill is dependant upon.....
.... venous return and the ventricles ability to stretch further and enlarge
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The hearts ability to empty is dependant upon.....
.....a greater EDV provides a greater stretch on the heart walls which also increases the force of ventricular systole.
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Heart regulation increased.....
...impulses sent along the accelerator nerve vis the sympathetic system to the SA node
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Heart regulation decreased....
...impulses sent along the vagus nerve via the parasympathetic nerve to the SA node
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Starlings Law
Stroke volume is dependant on venous return. If venous return increased then so does stroke volume and vice versa
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Other cards in this set
Card 2
Front
Ligament
Back
A band of strong fibrous tissue - to connect bone to bone
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