Respiration Flashcards
Cellular respiration
The process of oxidising food molecules, like glucose, to produce CO2 & water
Internal respiration
The exchange of gases between the blood & the individual cell in the tissue/body
External respiration
The exchange of gases across the respiratory surface between the alveoli & the blood
Breathing
The process in which oxygen is taken in from the external environment
How does oxygen get from the atmosphere into a cell in your body?
You breathe in oxygen & it goes into your lungs, where it crosses into the blood. From the blood, it travels through the body & into a body cell (internal respiration).
What is the function of cilia in the respiratory system?
The cilia help remove foreign particles from the lungs.
In the lungs, where does gas exchange occur?
Gas is exchanged between the alveoli & the capillaries (tiny blood vessels)
When we exhale, our breathe contains approx 80% nitrogen, 17% oxygen, & 3% carbon dioxide. Explain how mouth to mouth resuscitation provides sufficient oxygen to an unconscious person.
The normal air we breathe contains approx 21% oxygen & 0.04% carbon dioxide. The air you blow into a victims mouth thus contains less but it is still 17% oxygen, which is more than enough to supply the needs of respiration.
Inspiratory reserve volume
The amount of extra air inhaled (above tidal volume) during a deep breath
Expiratory reserve volume
The amount of extra air exhaled (above tidal volume) during a forceful breath out
Anatomical dead space air
The last bit of air to be exhaled from the previous exhalation, which is depleted of oxygen.
Residual volume
The amount of air left in the lungs following maximal exhalation
Vital capacity
The most air you can exhale after taking the deepest breath.
Tidal volume
The amount of air which enters the lungs during normal inhalation at rest
