Which factors does the surface area and volume affect?
The importance of exchange surfaces and transport systems in humans | Exit Quiz | Oak National Academy

Quiz
•
Science
•
9th Grade
•
Hard
Oak National Academy
FREE Resource
6 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
rate of diffusion
diffusion distance
which substances can diffuse in and out of a cell
Answer explanation
Which substances can enter and leave a cell is determined by a combination of molecule size, its properties, and the cell membrane, not the surface area or volume.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
True or false? Large living organisms have a large surface area to volume ratio.
true
false
Answer explanation
An elephant has a smaller surface area to volume ratio than a mouse. Large living organisms have a small surface area to volume ratio.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is a small surface area a disadvantage to organisms?
Decreasing SA : V decreases diffusion rate.
Decreasing SA : V increases diffusion rate.
Answer explanation
A smaller surface area to volume ratio results in a lower diffusion rate and cells may not get what they need to survive quick enough.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Having many villi {{}} the surface area over which diffusion can take place.
increases
decreases
does not impact
Answer explanation
The shape of the villi and the number of them creates a very large surface area over which diffusion can take place.
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
What are the advantages of a circulatory system?
It means substances don't have to diffuse.
It moves nutrients and waste products around the body.
It reduces the time taken for substances to diffuse from the blood to the cells.
It brings blood near to the surface of cells which reduces diffusion distance.
It means active transport will occur instead of diffusion.
Answer explanation
Substances that are transported in the blood still need to diffuse into cells, but they are bought into close contact with the body cells and only have a short distance to diffuse.
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
How are the alveoli adapted for efficient diffusion?
good blood supply
large surface area
thin cells
thick cells
small surface area
Answer explanation
Thick cells would mean a large diffusion distance which would slow down diffusion. A small surface area would mean less diffusion could take place.
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