Exchange Surfaces
The effectiveness of an exchange surface is increased by having a large surface area and a thin membrane.
Name one feature of an efficient exchange surface.
What is Exchange Surfaces?
"Exchange surfaces are specialized areas in an organism, such as the lungs or gills, designed for the efficient movement of substances."
Which answer best completes the statement? The nucleus contains ____ and controls the cell
Why are cultures in school laboratories usually incubated at about 25°C rather than 37°C?
Osmosis is the diffusion of water through a:
Which answer best completes the statement? The permanent vacuole is filled with ____
Material Exchange
Surface area to volume ratio: Drops as an organism gets larger; multi-cellular organisms need specialised exchange surfaces.
Alveoli: In the lungs for gas exchange.
Villi: In the small intestine for food absorption.
Gills: In fish for oxygen extraction from water.
Leaves: In plants for CO2 and water vapour exchange.
A thin membrane provides a "short diffusion path," making exchange much faster.
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