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Related Flashcards
Cards In This Set
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What is the purpose of the Respiratory System?
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To supply an adequate supply of oxygen to meet the demand and to remove waste Carbon DIoxide from the Body.
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What happens when we breathe out?
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The intercostal muscles contract, the diaphram flattens. PRessure is lower inside the body than outside so the gases move in.
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What is the theory of Partial Pressure
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Gas will always move from areas of high pressure to areas of low pressure.
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Which three lung Volumes provide air to the body during exercise?
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Inspiratory Reserve Volume, Tidal Volume and Expiratory Reserve Volume.
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What would be the effect of a period of continuous running on a Spirometre Trace?
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The waves would be closer together as they are breathing faster, The peaks would become higher and the troughs lower as the athlete is breathing deeper.
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What is Vital Capacity?
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The Maximal amount of air exhaled after maximal expiration.
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What two ways is oxygen carried in the body?
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The Majoritory carried by Haemoglobin (Hb) and the rest dissolved into blood plasma.
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How much blood combines with Haemoglobin?
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THis is dependant on the Partial Pressure of Oxygen
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What is the Bohr Shift?
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The Bohr Shift is the change in shape of the oxyhaemoglobin dissociation curve caused by oxygen dissociating with haemoglobing more readily resulting in the release of more oxygen in the exercising muscles.
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What is the Arterio-Venous difference?
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The amount of oxygen removed from the blood by the muscles. - The difference between the O2 at the artery and the vein
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Describe how Oxygen is transported to the working muscles and the effect that strenuous exercise will have on its delivery and why it has this effect.
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-Oxygen transported by Haemoglobin.
-Acidic condition casued by higher levels of Co2 + Lactic acid cause oxygen to split more readily from haemoglobin
- Increase in temperature decreases haemoglobins ability to carry oxygen/ more is relesed from oxyhaemoglobin.
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Give three characteristics that make the lungs an efficient respiratory surface
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-Capillery walls one cell thin therefore has a shorter diffusion distance
-Capilleries around the alveoli create a huge surface area
-Blood cells become distorted with a larger suface area because the cappillery diameter is narrower than the blood cell
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What two parts of the body does gas exchange take place at?
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Between the air in the alveoli and the blood in the surrounding capilleries and between the tissues/muscles of the body and the surrounding capilleries.
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