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Surface area to volume ratio
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Created by
Agatha Steed
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Cards (32)
Why can single-celled bacteria rely on diffusion?
They have a high
surface area to volume ratio
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What do large multicellular organisms require for substance exchange?
Specialized
exchange surfaces
and transport systems
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What resources do single-celled organisms need to absorb?
Oxygen, glucose, and
amino acids
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What waste products do single-celled organisms need to eliminate?
Carbon dioxide
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How does surface area to volume ratio affect organisms?
It determines their ability to exchange
substances
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What happens to surface area to volume ratio as organisms get larger?
It
decreases
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How does the surface area to volume ratio change from a bacterial cell to a cow?
It
decreases
as
size increases
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What is the surface area of a cube calculated from?
Area of one face
multiplied
by six
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What is the surface area of a 1 cm cube?
6
square centimeters
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What is the volume of a 1 cm cube?
1
cubic centimeter
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What is the surface area to volume ratio of a 1 cm cube?
6 to 1
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What is the surface area of a medium cube with a volume of 8 cm³?
24 square centimeters
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What is the surface area to volume ratio of the medium cube?
3 to 1
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What is the surface area of the largest cube with a volume of 27 cm³?
54 square centimeters
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What is the surface area to volume ratio of the largest cube?
2 to 1
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How do surface area and volume change as cubes increase in size?
Volume increases faster
than
surface area
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Why can't humans rely solely on diffusion for substance exchange?
We have a low
surface area to volume ratio
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What specialized exchange surfaces do humans have?
Lungs
and
intestines
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What do alveoli in the lungs provide?
A huge
surface area
for gas exchange
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What do villi in the intestines provide?
A massive
surface area
for nutrient absorption
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How does diffusion distance change in larger organisms?
It increases significantly
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How much further do molecules have to diffuse in humans compared to bacteria?
50,000
times further
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Why do larger organisms need transport systems?
To transport molecules
efficiently
around the body
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What do plants use for substance exchange?
Roots and leaves
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What tissues do plants use to transport substances?
Phloem
and
xylem
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What does "large organisms" refer to?
Anything visible to the
naked eye
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What is the purpose of the learning platform mentioned?
To watch
videos
and track
progress
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What is provided in the description of the video?
A link to the
lesson
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What is arranged in a playlist?
All
videos
for this subject
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Surface area: volume ratio
Surface area: volume ratio
Surface area: volume ratio