1.6 - Cell Transport Flashcards
What is the Definition of Diffusion?
The Net Movement of Particles from an Area of Higher Concentration to an Area of Lower Concentration.
What States can Diffusion occur in?
Gases & Liquids
What 3 Molecules can Diffuse into and out of Cell Membranes?
- Water
- Glucose
- Amino Acids
What 2 Molecules cannot Diffuse Into and Out of Cell Membranes & Why?
- Proteins
- Starch
- They are too big
What does a ‘Passive Process’ mean?
A process that doesn’t require any energy from the cell.
Is Diffusion a Passive or Active Process?
A Passive Process
What 3 Factors Affect the Rate of Diffusion?
- Concentration Gradient (The difference in concentration between 2 places).
- Temperature (Higher Temperatures = More Energy).
- Surface Area (Large Surface Area = More Diffusion).
What is the Definition of Osmosis?
The Net Movement of Water Molecules across a Partially Permeable Membrane, from a region of Higher Water Concentration, to a region of Lower Water Concentration.
What is Water Concentration?
The Proportion of Water : Solutes
What is the Definition of Active Transport?
The Movement of Molecules across a Cell Membrane, from a region of Lower Concentration to a region of Higher Concentration, requiring Energy from Cellular Respiration.
Is Active Transport a Passive or Active Process?
An Active Process
What is an Active Process?
A Process that Requires Energy from the Cell.
Where does Active Transport always take place?
Across a Cell Membrane
What does Active Transport need Special Proteins in the Membrane for?
Transferring the Molecule from one side to the other.
How is the Energy Released from Cellular Respiration Stored?
In Molecules called ATP which take the Energy to the parts of the Cell that need it.
