Diffusion Flashcards
Which out of solids, liquids and gases can diffuse?
Liquids and glass because the particles move more freely.
What is diffusion?
Diffusion is the net movement of particles from an area of high concentration to an area of low concentration.
What is diffusion about and based on?
Diffusion is all about the probability of particles moving in a particular direction. As the particles move around, there is a greater chance that a particular particles of a particular type moves away from an area of greater concentration than a particle moving from a lower concentration.
What are the factors that affect diffusion!
Concentration gradient Temperature Distance Surface area Size
Explain how the concentration variant in diffusion
The concentration signifies the difference in concentration between the area of high concentration between the area of high concentration vs that of an area of lower concentration steeper the gradient, the greater the rate of diffusion.
Explain how temperature influences diffusion
The higher temperature will increase diffusion as particles have more kinetic energy and this will move more rapidly.
Explain how distance influences diffusion
The shorter the distance that the particles have to travel, the more efficient diffusion occurs.
Explain how surface area influences diffusion
The greater the surface area is, the greater the number of molecules that can cross the membrane in Anya given timeframe.
Explain how size influences diffusion
Smaller molecules diffuse faster than larger molecules.
Why is Diffusion needed.
Without diffusion, many processes wouldn’t be able to occur.
What substances can move thorough cell membranes?
Small substances that are not charged
What are some substances that can move through a cell membrane?
Water
Oxygen
Carbon dioxide
Does diffusion use energy?
No the movement costs NO energy
What does partially permeable mean?
It means that other substances cannot move through the membrane by diffusion.
Where is the palisade cell found?
On the top half of a leaf, where most of the sunlight is. Chloroplasts are found in palisade cells. They trap the Suns energy during photosynthesis.
What does active transport use?
It uses protein carriers and energy to move a substance against its concentration gradient.
Hi
Jel
What is osmosis?
The diffusion of water from a place of high water potential o a place of low water potential
What water potential does a dilute have?
A high water potenial
What water potential does a concentrated solution have?
A low water potential
How permeable are cell walls?
Fully permeablp
How permeable are cell membranes?
Partially permeable
What is turgid?
When the cell membrane is pushed against the cell wall
What is turgor pressure?
The pressure of the cell against the cell wall
