Exchange surfaces (AQA GCSE Biology Combined Science): Flashcards
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Exchange surfaces definition
Exchange surfaces definition
Special areas that help materials move in and out of cells
Surface area to volume ratio meaning
Surface area to volume ratio meaning
Comparing surface area to volume inside an organism
Small organisms' SA:V ratio
Small organisms' SA:V ratio
High - lots of surface area compared to volume
Large organisms' SA:V ratio
Large organisms' SA:V ratio
Low - not much surface area compared to volume
First way to improve exchange surfaces
First way to improve exchange surfaces
Increase the surface area
Second way to improve exchange surfaces
Second way to improve exchange surfaces
Make diffusion distances shorter
Third way to improve exchange surfaces
Third way to improve exchange surfaces
Maintain concentration gradients
Alveoli surface area in humans
Alveoli surface area in humans
About
Villi in small intestine
Villi in small intestine
Finger-like projections that increase surface area
Counter-current flow in fish gills
Counter-current flow in fish gills
Blood flows opposite to water, maximises oxygen uptake