the spreading/movement of particles in any substance resulting in a net movement from an area of a higher concentration to a lower concentration.
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what is the equation for net movement?
net movement = particles moving in - particles moving out.
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what is the concentration gradient?
the difference between two areas of concentration is known as the concentration gradient.
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why does diffusion take place faster when there is an increase in temperature?
an increase in temp means that the particles in a gas or solution move more quickly.
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why do so many cells have folded membranes along at least one surface?
these folds form microvilli which help increase the surface area of the cell therefore resulting in the diffusion of the cell membrane taking place more quickly.
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what dissolved substances move in and out of cells by using diffusion?
glucose, urea and gases such as oxygen and carbon dioxide.
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Other cards in this set
Card 2
Front
what is the equation for net movement?
Back
net movement = particles moving in - particles moving out.
Card 3
Front
what is the concentration gradient?
Back
Card 4
Front
why does diffusion take place faster when there is an increase in temperature?
Back
Card 5
Front
why do so many cells have folded membranes along at least one surface?
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