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cell cycle
DIFFUSION
active transport
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Created by
ayman
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Cards (16)
What should you be able to describe by the end of the video on
active transport
?
How
substances
are absorbed by active transport and examples in
animals
and
plants
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What is
diffusion
?
The net movement of particles from an area of higher
concentration
to an area of lower concentration
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What does the term "
net
" mean in the context of
diffusion
?
Overall movement of
particles
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What is a
concentration gradient
?
A region with a high concentration and a region with a low concentration
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How does
active transport
differ from
diffusion
?
Active transport moves substances against the
concentration gradient
, while diffusion moves them down the gradient
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What is required for
active transport
to occur?
Energy from
respiration
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What is an example of
active transport
in the human body?
Transport of sugars such as
glucose
in the small intestine
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Why can't sugars diffuse into the cell from the
lumen
of the
small intestine
?
Because the concentration of sugars is lower in the lumen than inside the cell
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What role do mitochondria play in
active transport
?
Mitochondria
provide the energy needed for active transport
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What is an example of
active transport
in plants?
Transport of ions such as
magnesium
into
root hair cells
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Why do plants need
magnesium
?
To make
chlorophyll
in the leaves
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How do
root hair cells
utilize
active transport
?
They move
ions
from a lower concentration in the soil to a higher concentration inside the cell
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What happens to the
ions
after they are transported into the root hair cells?
They are transported to the
xylem vessels
and moved to the leaf
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What do
root hair cells
have that supports active transport?
Lots of
mitochondria
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What are the key differences between
active transport
and diffusion?
Active transport moves substances against the
concentration gradient
, while diffusion moves them down.
Active transport requires energy from
respiration
, whereas diffusion does not.
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What are the examples of
active transport
in animals and plants?
Animals: Transport of
glucose
in the
small intestine
.
Plants: Transport of
magnesium ions
in
root hair cells
.
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