BIOL1008 Lecture Notes - Lecture 17: Asthma, Spirometry, Vasoconstriction
9 Jun 2018
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Lecture 17: The respiratory system
Not all respiratory
functions
- Route for water loss and
heat elimination
- Enhances blood returning to the heart
- Enables speech, singing, and other vocalisations
- Defends against inhaled foreign matter
- Removes, modifies, activates, or inactivates various materials passing through the lungs
- Nose serves as the organ of smell
What happens when we take a deep breath?
- Air rushes in through the nose
- The chest expands
- The abdomen expands slightly
Like fluid, gases also move down a pressure gradient
- To move O2 from the atmosphere into our lungs, the pressure must be lower in the
lungs
- Achieved by expansion of the chest wall
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2
We can alter the
volume within our
lungs
Spirometry allows us to measure lung function
- It measures lung function, specifically the amount (volume) and/or speed (flow) of air
that can be inhaled and exhaled.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Route heat respiratory for water loss and elimination. Removes, modifies, activates, or inactivates various materials passing through the lungs. Nose serves as the organ of smell. Like fluid, gases also move down a pressure gradient. To move o2 from the atmosphere into our lungs, the pressure must be lower in the lungs. Achieved by expansion of the chest wall. We can volume lungs alter the within our. It measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled. Spirometry is helpful in assessing breathing patterns that identify conditions such as asthma, pulmonary fibrosis, cystic fibrosis, and copd. Obstructive lung disease (shortness of breath due to difficulty exhaling air from lungs) Restrictive lung disease (people with restrictive lung disease cannot fully fill their lungs with air. Diseases affecting diffusion of o2 and co2 across pulmonary membranes.
