6.1 - Surface Area to Volume Ratio Flashcards
Why organisms need exchange How surface area to volume ratio affects exchange
1
Q
What do living organisms need to exchange with their environment?
A
Materials like oxygen, glucose, excretory products like urea, and heat with their environment.
2
Q
Where does this exchange occur?
A
Across plasma membranes
3
Q
What affects the rate of substance diffusion across an organism’s surface?
A
Surface area to volume ratio (SA:V)
4
Q
How does high SA:V affect diffusion?
A
Fast diffusion
5
Q
How does low SA:V affect diffusion?
A
Slower diffusion
6
Q
Do smaller or larger organisms have a higher SA:V?
A
Smaller organisms
7
Q
How do you calculate the surface area (SA) of a cube?
A
SA = length x width x 6
8
Q
How do you calculate the volume (V) of a cube?
A
V = length x width x depth
9
Q
What is the SA:V of a 1 cm cube?
A
0.25069444444444455
10
Q
What is the SA:V of a 2 cm cube?
A
0.12569444444444455
