Lecture 8- Transport And Exchange Flashcards
1
Q
How to calculate volume
A
Length x width x height
2
Q
How to calculate total surface area
A
Length x width
Multiply by the amount of faces
3
Q
What is the unit for surface area and volume
A
Volume= cm 3
Area = cm2
4
Q
How to work out volume ratio
A
Surface area : volume
5
Q
What happens in single cell organisms
A
Single cell organism diffuse very quickly.
Small distances for a substance to travel
6
Q
What happens in multicellular organisms
A
Cells have low surface area to volume ratio
So they need specialised exchange organs like lungs
7
Q
What system does large multicellular organism need
A
Transport system
8
Q
What happens if there is a greater surface area to volume ratio
A
Better absorption
9
Q
What increases surface area
A
Branching
Flattening
Projections
Folding
