Biology A-Level
pressure differences across valves
What pressure differences across valves means in Biology A-Level, as defined for AQA.
Definition of pressure differences across valves
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Reference: AQA
Valves are passive: each opens when the pressure behind it is greater than the pressure in front, and closes when that reverses.
Topics that use pressure differences across valves
- Mass transport in animals (AQA A-Level)
Related terms
- affinity
- affinity for oxygen
- atrial systole
- Atrioventricular valves
- biconcave disc
- Biological drawing conventions
- Bohr effect
- Causation
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