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Biology
B1
diffusion
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Created by
Poppy
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Cards (15)
What is diffusion?
Net movement of
particles
from high to low
concentration
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What happens to molecules over time if left alone?
They spread out due to
random motion
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What is the definition of net movement in diffusion?
Movement
of
all
particles
considered
together
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In what states of matter can diffusion occur?
Both
gases
and
liquids
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What happens when you spray perfume in a room?
It
diffuses
across the whole room
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What occurs when food coloring is added to water?
It
diffuses
until the water is the same color
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What type of membranes allow diffusion of some molecules?
Partially permeable
membranes
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Which molecules can generally diffuse through cell membranes?
Small molecules like
water
and glucose
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Why is diffusion considered a passive process?
It doesn't require energy from the
cell
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What is the first factor that affects the rate of diffusion?
The
concentration gradient
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How does a larger concentration gradient affect diffusion?
It increases the
rate of diffusion
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What effect does temperature have on diffusion?
Higher temperatures increase the
rate
of diffusion
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How does surface area influence the rate of diffusion?
Larger
surface area
increases
the rate of diffusion
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What are the three factors that affect the rate of diffusion?
Concentration gradient
Temperature
Surface area
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How does a larger surface area facilitate diffusion?
More
particles
can fit around the surface
More particles can diffuse in and out simultaneously
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