Topic 6

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  • Created by: rfraser96
  • Created on: 18-04-17 11:07
What is haematocrit? (2 marks)
The volume percentage of red blood cells in blood
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Why is haematocrit initially reduced following a period of endurance training?
Plasma volume increases more than red blood cell volume
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Why is the reduction in haematocrit following a period of endurance training beneficial?
Blood is less viscous, decreased resistance to flow so enhanced oxygen delivery
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Why is oxygen extraction increased post-training?
increased capillary density in the myocardium allowing greater surface area for diffusion, shorter diffusion distance and slower blood flow
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How much of the increase in maximum oxygen uptake after endurance training is due to increased cardiac output, and how much is due to increased oxygen extraction?
50% due to increased cardiac output and 50% due to increased arterio-venous oxygen difference.
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Other cards in this set

Card 2

Front

Why is haematocrit initially reduced following a period of endurance training?

Back

Plasma volume increases more than red blood cell volume

Card 3

Front

Why is the reduction in haematocrit following a period of endurance training beneficial?

Back

Preview of the front of card 3

Card 4

Front

Why is oxygen extraction increased post-training?

Back

Preview of the front of card 4

Card 5

Front

How much of the increase in maximum oxygen uptake after endurance training is due to increased cardiac output, and how much is due to increased oxygen extraction?

Back

Preview of the front of card 5

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