Transport + General Flashcards
Diffusion
The movement of molecules (liquid or gas) from an area of high concentration to an area of low concentration
The bigger the surface area …
The faster the rate of diffusion
The greater the concentration gradient …
The faster the rate of diffusion
The higher the temperature …
The faster the rate of diffusion
The longer the diffusion distance …
The slower the rate of diffusion
Molecules move around because …
They have kinetic energy
Ways to increase SA:
- Folded surface
- Elongated
- Flat surface
Small organisms have a …
Larger SA/V ratio compared to larger organisms
A larger SA/V ratio means …
That the rate of diffusion into and out the organism is faster
SA/V ratio
The amount of surface area per unit of volume
Categorical variable
Descriptive, not numerical e.g Colour
Discrete variable
Numerical, whole numbers e.g Children
Continuous variable
Numerical, infinite data set e.g Time
Independent variable
Variable that you change
Dependent variable
Variable that you measure
