Diffusion, Active Transport and Osmosis Flashcards
What is Diffusion?
Diffusion is the movement of particles from an area of high concentration to an area of low concentration down a concentration gradient
What is a passive process?
A passive process dosen’t require any energy and happens naturally
What are the factors effecting the rate of diffusion?
- Temperature
- Surface area
- Concentration gradient
What is the structure of Alveoli (lungs) and how does the structure increase the rate of diffusion?
Structure = One cell thick and millions of alveoli (Large surface area)
RoD = This decreases the diffusion pathway
What is the structure of Small Intestine and how does the structure increase the rate of diffusion?
Structure = Villi (extensions), Close to the blood and one cell thick
RoD = Increases the surface area
What is the structure of Fish Gills and how does the structure increase the rate of diffusion?
Structure = Lots of gill filaments
RoD = Short Diffusion Pathway
What is the structure of Roots and how does the structure increase the rate of diffusion?
Srructure = Thin cell wall
RoD = Decreases the diffusion pathway
What is the structure of the Leaf and how does the structure increase the rate of diffusion?
Structure = Large extension
RoD = Increases the surface area
What is Active Transport?
Active transport is the movement of particles from a low concentrarion to a high concentration against a concentration gradient requiring energy
What is Osmosis?
Osmosis is the movement of water from a dilute to a more concentrated solution through a partially permeable membrane
What is a dilute solution?
- Low concentration of solute (sugar)
- High concentration of solvent (water)
- This is also called a Hypotonic Solution
What is a Concentrated solution?
- High concentration of solute (sugar)
- Low concentration of solvent
- Also called a Hypertonic solution
What is an Isotonic solution?
An isotonic solution is a solution that contains the same amount of water as sugar
