Why does the Frank-Starling mechanism have its greatest influence during low int
ID: 3521648 • Letter: W
Question
Why does the Frank-Starling mechanism have its greatest influence during low intense exercise intensities?
A)The Frank-Starling mechanism is when contractility of the heart increases due to increases in sympathetic nerve stimulation. Its greatest influence is during lower intensity exercises because the heart has time to fill at its max capacity between beats.
B) The Frank-Starling mechanism is when contractility of the heart increases due to increased filling capacity of the heart. Its greatest influence is during lower intensity exercises because the heart has time to fill at its max capacity between beats.
C)The Frank-Starling mechanism is when contractility of the heart increases due to increased filling capacity of the heart. Its greatest influence is actually during high intense exercise because this is when the muscle pump is fully activated.
D) The Frank-Starling mechanism is when contractility of the heart increases due to increases in sympathetic nerve stimulation. Its greatest influence is actually during high intense exercise because this is when the muscle pump is fully activated.
A)The Frank-Starling mechanism is when contractility of the heart increases due to increases in sympathetic nerve stimulation. Its greatest influence is during lower intensity exercises because the heart has time to fill at its max capacity between beats.
B) The Frank-Starling mechanism is when contractility of the heart increases due to increased filling capacity of the heart. Its greatest influence is during lower intensity exercises because the heart has time to fill at its max capacity between beats.
C)The Frank-Starling mechanism is when contractility of the heart increases due to increased filling capacity of the heart. Its greatest influence is actually during high intense exercise because this is when the muscle pump is fully activated.
D) The Frank-Starling mechanism is when contractility of the heart increases due to increases in sympathetic nerve stimulation. Its greatest influence is actually during high intense exercise because this is when the muscle pump is fully activated.
Explanation / Answer
The Frank - Starling mechanism is when increased blood in the ventricle will stretch the muscle fibres , leading to increase bumber of cross bridges and increased force of contraction.this happens in high intensity exercise.At low and moderate level exercise, the Frnak-Starling mechanism for increasing cardiac output, at peak exercise because of reduced left ventricular filling enhanced contractility is the major mechanism for maintaining stroke volume.
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