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Biology
Topic 8 Exchange and Transport in Animals
Surface Area to Volume Ratio
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Fred oldham
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Cards (32)
What concept is explained in this video regarding organisms?
Surface area to volume ratio
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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 change as organisms grow larger?
It
decreases
as organisms get
larger
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How is the surface area of a cube calculated?
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 side length of 2 cm?
24 square
centimeters
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What is the volume of a medium cube with a side length of 2 cm?
8
cubic centimeters
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What is the surface area to volume ratio of a medium cube?
3
to
1
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What is the surface area of a large cube with a side length of 3 cm?
54
square centimeters
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What is the volume of a large cube with a side length of 3 cm?
27
cubic centimeters
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What is the surface area to volume ratio of a large cube?
2 to 1
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How does the surface area to volume ratio change from the smallest to the largest cube?
It decreases from
6
to
1
to 2 to 1
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Why do larger organisms need specialized exchange surfaces?
To increase their
surface area to volume ratio
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What structures in the lungs increase surface area for gas exchange?
Alveoli
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What structures in the intestines increase surface area for nutrient absorption?
Villi
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How does diffusion distance change as organisms grow larger?
It increases
significantly
with size
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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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What is the role of transport systems in larger organisms?
To transport molecules from
exchange surfaces
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What do plants use for substance exchange with the environment?
Roots
and
leaves
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What tissues do plants use to transport substances?
Phloem
and
xylem
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What does the term "large organisms" refer to?
Anything visible to the
naked eye
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Who is the presenter of the video?
Amadeus
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What does the learning platform offer?
Videos, practice questions, and
progress tracking
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Is the learning platform free?
Yes
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Where can you find the link to the lesson?
In the
description
below the video
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What is the purpose of the playlist mentioned in the video?
To organize all videos for the
subject
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What is the final message from the presenter?
Hope you
enjoy
and
see
you
next
time
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