Ash
4/12/2013 11:45:15
HI, i anyone has any issues regarding anything about the last two sessions let me know..
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Joe
7/12/2013 07:16:56
Hi ash in regards to that exam question set during last week, can you explain why ESV goes up and why EDV goes down from rest to during exercise. Thanks
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Ash
8/12/2013 11:48:59
Hi as I see this you need to know when you are talking about, however, ESV will go up as the exercise begins as there is a greater demand for O2/blood compared to when there is rest. This is possible as the venous return and the EDV will go up. However, when the exercise intensity reaches a certain level the heart is pumping too fast to maintain the increase in EDV and also the ESV. In other words the heart can' fill quick enough. As the heart rate increases the heart is able to fill less so the EDV then goes down. The heart copes with this by increasing the heart rate further. :)
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Elle
10/12/2013 14:30:58
In response to the athlete scenario:
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Patrick
15/12/2013 23:39:45
By stopping the muscle and respiratory pump mechanism, the reduced blood pressure causes a lack of blood supply to the brain causing the athlete to faint. Venous return, stroke volume and cardiac output all decrease. Blood pooling occurs due to insufficient pressure to maintain venous return against gravity. Like Elle said, by lowering the head will restore blood flow to the brain and aid venous return.
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4/8/2016 23:55:37
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10/10/2016 10:31:39
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