Diffusion Osmosis and Active Transport

What is diffusion?

• when molecules move from a region of high water potential to a region of low water potential through a partially permeable membrane

• net movement of molecules from a region of high concentration to a region of low concentration.

• no movement

• the constant and random movement of molecules

Tags

NGSS.HS-LS2-3

Where is there a low concentration of dye?

• at the bottom of the cup

• in the coloured dye

• at the top of the cup

• no concentration gradient

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Osmosis is the movement of _____ across a partially permeable membrane.

• food molecules

• energy

• oxygen molecules

• water molecules

During osmosis ____________________.

• water moves from high to low water potential across a partially permeable membrane

• large or oddly shaped molecules move across a cell membrane

• water moves when energy is used

• proteins are built

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck

What is the definition of the term 'partially permeable'?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.

• The movement of materials through (or across) the cell membrane

• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.

• The movement of molecules from a region of high concentration to a region of low concentration

What does a cell need to transport molecules by active transport?

• Sun

• Wind

• Energy

• Water

When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of

• Osmosis

• Diffusion

• Equilibrium

• Active transport

A person would never have pure water put into their veins in a hospital because their cells would...

• shrink and become dehydrated

• swell and may burst

Tags

NGSS.HS-LS1-3