7. Respiratory System Flashcards
List the 5 functions of the respiratory system
- Brings air into lungs, transfers O2 into the blood at the lungs,
- Removes CO2 from the blood at the lungs, - Expels heat and water vapour in the air breathed out,
- Allows the vocal cords to create speech as air breathed out
List the 7 components of the respiratory conducting system
Nasal cavity, Pharynx, Larynx, Trachea, Bronchi, Bronchioles, Alveoli
Outline the role of the diaphram in breathing
As the diaphragm moves up and down, the chest cavity decreases and increases in size, causing breathing (inspiration and expiration).
Desribe inspiration
- Diaphragm contracts
- Pulls ribcage downwards,
- Inter-costals pull ribs out
- This expands the volume of the chest cavity which decreases air pressure inside the lungs
- Air then travels from high to low pressure
Describe expiration
- Diaphragm and inter-costals relax
- Elasticity of thorax squeezes out any air from the chest cavity
Define V
Ventilation is the amount of air breathed in and out in one minute
Define TV
Tidal Volume is the amount of air breathed in and out per breath.
Define RR
Respiratory rate is the amount of breaths taken per minute
List the equation for V
V = TV x RR
Define Lung Capacity
Total lung capacity is the volume of air that can be held in the lungs after maximum inspiration.
Define V02 max
The maximum amount of oxygen that can be taken in, transported to and used by the working muscles to produce ATP.
Define diffusion
Diffusion involves the movement of a molecule from a higher concentration to a lower concentration across a thin membrane.
List 6 acute respiratory responses to exercise
Increased V, TV, RR, diffusion, V02 and effort of the rib cage and diaphragm
