Cell Bio - Diffusion Flashcards
1
Q
Define Diffusion
A
The net movement of particles from an area of higher concentration to an area of lower concentration DOWN the concentration gradient
2
Q
- Define the term “Net Movement”?
- Define the term “Concentration Gradient”?
A
- The movement of all of the particles considered together as a group.
- Difference in the concentration between two areas of a substance
3
Q
Explain why diffusion is important to all cells
A
Helps cells gain essential materials for energy and growth whilst getting rid of waste products.
4
Q
State three waste products a cell produces
A
- Carbon Dioxide - Waste product of Aerobic Respiration
- Urea
- Ammonia
5
Q
State three important substances a cell requires and describe their functions
A
- Glucose - Needed for Aerobic Respiration
- Oxygen - Needed as an energy source for making ATP
- Amino Acids - Needed for making Proteins
6
Q
State and describe the three factors that affect the rate of diffusion
A
- Concentration Gradient - the larger the concentration gradient, the higher the rate of diffusion
- Temperature - The higher the temperature, the higher the rate of diffusion
- Surface Area - the larger the surface area, the higher the rate of diffusion.
7
Q
- Explain the process of Diffusion
- Diffusion stops when…
A
- Particles collide with each other or their container, making them change direction. Eventually, the particles are spread through the whole container or substance.
- …the concentration of the substance is equal in all areas.