Surface Area to Volume Ratio Flashcards
1
Q
What are examples of materials that need to be interchanged between organisms and their environment?
A
- Respiratory gases (oxygen and carbon dioxide)
- Heat
- Nutrients
- Excretory products
2
Q
Does surface area to volume ratio decrease or increase as the organism gets larger?
A
Decreases
3
Q
Define diffusion
A
The movement of molecules from an area of high to low concentration
4
Q
How do you find surface area of a cube?
A
area of one side x6
5
Q
What units is surface area measured in?
A
cm^2
6
Q
What makes a good exchange surface?
A
- Large surface area
- Large concentration gradients
- Thin exchange surface
7
Q
What is Fickโs law?
A
Rate of diffusion = (surface area x difference in concentration) / thickness of surface
8
Q
Equation to find surface area of a sphere?
A
4๐๐ยฒ
r = radius
9
Q
Equation to find volume of a sphere?
A
4/3๐๐ยณ
