Flashcards
Ventilation in Mammals
Cards in this deck (17)
- 1What does ventilation consist of?Inspiration
Expiration - 2What is ventilation controlled by?It is controlled by the movements of the diaphragm, intercostal muscles and ribcage
- 3What happens during inspiration?External intercostal and diaphragm muscles contract
Ribcage moves upwards and outwards, and diaphragm flattens, increasing volume of the throax
Lung pressure decreases (below atmospheric pressure)
Air flows into lungs - 4TRUE OR FALSE Inspiration is an active processTRUE
It requires energy - 5What happens during expiration?External intercostal and diaphragm muscles relax
Ribcage moves downwards and inwards, and diaphragm becomes curved again, decreasing thorax volume
Lung pressure increases
Air is forced out of the lungs - 6TRUE OR FALSE Expiration is an active processFALSE
It is a passive process - does NOT require energy - 7What happens during forced expiration?The inner intercostal muscles contract to pull the ribcage down and in
- 8How does a spirometer work?A spirometer has an oxygen-filled chamber with a movable lid. As the person breathes in and out, the lid of the chamber moves up and down. A pen attached to the lid writes on a rotating drum, creating a spirometer trace. Soda lime in the tube absorbs CO₂
- 9What is tidal volume?Volume of air in each breath (usually 0.4dm³)
- 10What is vital capacity?Maximum volume of air that can be breathed in or out
- 11What is breathing rate?How many breaths are taken per unit time (usually per minute)
- 12What is oxygen uptake?Rate at which a person uses up oxygen (e.g. the number of dm³ used per minute)
- 13Complete the sentences: The total volume of gas in the chamber __________ over time; the air that is breathed out is a mixture of _____ and ____. The CO₂ is absorbed by the _____ _____, the oxygen gets used up by respiration and the total _________ decreases.The total volume of gas in the chamber DECREASES over time; the air that is breathed out is a mixture of O₂ and CO₂. The CO₂ is absorbed by the SODA LIME, the oxygen gets used up by respiration and the total VOLUME decreases.
- 14What must be done to get a valid reading?The person must wear a nose clip
The machine must be airtight - 15What does a spirometer trace look like?
- 16How is oxygen uptake measured?Oxygen uptake is the decrease in the volume of gas in the spirometer chamber
- 17TRUE OR FALSE: On a spirometer trace, upwards = breathing outTRUE
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- User has deleted their subject information Flashcards on Ventilation in Mammals, created by Deleted user on 05/03/2018.
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- Deleted user · Mar 2018
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- Mar 5, 2018
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- Created by Yinka F · Jan 31, 2018
- Copied by Yinka F · Mar 5, 2018
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