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AS Respiration

Q&A

QuestionAnswer
Name the structures in the lungs that help gas exchange Large surface area / thin capillary walls / moist surface / extensive network of blood vessels
Name the muscle that contract during inspiration External intercostals muscles diaphragm
Name the muscles that aid expiration during exercise Internal intercostal muscles abdominals
What is tidal volume? The air breathed in or out per breathe
How does breating rate increase? Tidal volume increases by utilizing the expiratory and inspiratory reserve volumes / breathing rate increases
What is the purpose of residual volume? Air that remains in the lungs after max expiration and stops lungs from collapsing
What is the equation for minute ventilation(VE) VE= Tidal volume x breathing rate
What happens to minute ventilation during sub maximal exercise? It will increase then plateau as demand for oxygen is being met by ventilation rate
What happens to inspiratory reserve volume during exercise It reduces to allow tidal volume to increase
What happens to expiratory reserve volume during exercise It reduces to allow tidal volume to increase
What sends messages to the brain to increase breathing rate? Chemoreceptors, proprioceptors and thermoreceptors
What nerves are used to increase breathing rate phrenic and intercostal muscles
What do the accessory muscles do? Lift the ribcage higher to allow more air to be taken into the lungs
What do the internal intercostal muscles and abdominals muscle do during exercise? Contract and pull the ribcage down quickly which allows the frequency of breathing to increase.
Created by: Tina Dean
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