Respiratory System Key Terms
- Created by: elise.richmond
- Created on: 27-03-17 09:22
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- The Respiratory System
- Diffusion
- movement of gas molecules from areas of high concentration (or partial pressure) to areas of low concentration (partial pressure)
- Alveoli are responsible for gas exchange between the lungs and the blood, this occurs via diffusion
- Gaseous Exchange
- Movement of oxygen from air into the blood. and CO2 from blood into the air
- Tidal Volume
- Volume of air breathed in or out per breath.
- when IRV and ERV are used more, there tidal volume increases.
- Inspiratory reserve volume
- Volume of air that can be forcibly inspired after a normal breath
- Expiratory reserve volume
- Volume of air that can be forcibly expired after a normal breath
- Residual volume
- Amount of air that remains in the lungs after maximal expiration
- Minute ventilation
- Volume of air breathed in and out per minute
- MV will increase when exercise intensity increases, more breathing will help to meet oxygen demand
- Partial pressure
- pressure exerted by an individual gas when it exists in a mixture of gases
- concentration/diffusion gradient
- the difference in partial pressure, also known as the concentration gardient
- explains how gases flow from areas of high concentration to areas of low concentration
- The steeper the gradient, the faster the rate of diffusion
- Smoking
- smoking can damage cilia (help to move away fluids and particles)
- Leads to smokers cough as it is more difficult to get rid of mucus
- can lead to emphysema which is a lung disease that causes shortness of breath
- smoking can damage cilia (help to move away fluids and particles)
- Diffusion
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