Gas And Respiration Flashcards
Movement of gases from one compartment to another plays an important role in? (4 points)
- breathing and exchange of alveolar blood gases
- cellular respiration
- equipment used to aid breathing
- physiological responses to altitude and underwater pressure
Passive movement follows what rule?
Standard diffusion rules, always from a higher pressure to a region of lower pressure
If the concentration gradient is larger what is faster?
The diffusion rate
What must gases do in order to diffuse across a biological membrane?
Dissolve in a liquid
Diffusion of oxygen is from…..?
ECF to cells
Diffusion of carbon dioxide is from…?
ICF out of cells
What percentage of oxygen in the blood is dissolved in plasma?
1.5%
How is the majority (98.5%) of oxygen carried in red blood cells?
On haemoglobin
What is Boyle’s law?
The pressure of a gas varies inversely with its volume
What is the primary muscle in inspiration?
The diaphragm
What happens to the diaphragm during expiration?
It relaxes, moves back to its original state
What are the active and passive processes?
Passive - breathing out
Active - breathing in
What happens during the active process (breathing in)?
Chest expands (lung volume increases) —— diaphragm contracts (pressure decreases) = air moves in
What happens during the passive process (breathing out) ?
Chest contracts (lung volume decreases) —— diaphragm relaxes (pressure increases) = air moves out
What are the 2 types of respirators?
- negative pressure ventilator (iron lung)
- positive pressure system
