Question
In this graph what exactly describes the displacement of curves 1 & 2 (in order)?
| A. |
Increased Preload & Decreased Contractility
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| B. |
Decreased Preload & increased Contractility
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| C. |
Decreased Preload & Decreased Contractility
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| D. |
Increased Preload & increased Contractility
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Show Answer
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Correct Answer � D
Explanation
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Ans. D. Increased Preload & increased Contractility.
- The darker solid lines in the graph represnts normal force-velocity curve.
- Curve 1 with upward shift in the curve is due to increased preload & further diaplacement in curve 2 in upward direction is due to increased contractility.
- Force-velocity curves are altered when preload or contractility is changed.
- When preload is increased, the curve is shifted upward, but V m (the maximal velocity, occurring at zero afterload) is unchanged.
- Increased contractility, however, results in a shift in the curve with an increase in Vm.
