Cell Transport

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

During osmosis

• water moves from high to low concentration
• 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

The diffusion of water through a semi-permeable membrane is called?

• Osmosis
• Cell wall
• Diffusion
• Respiration

What is the definition of  Selective Permeability?

• 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 an area of high concentration to a area of low concentration 
  

Two examples of passive transport are

• Earth and Sun
• Diffusion and Osmosis
• Energy and Wind
• None of the above

What a cell needs to transport particles by active transport?

• Sun
• Wind
• Energy
• Channels

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

Controlling what goes into or out of the cell without energy is called

• active transport
• endocytosis
• passive transport
• exocytosis

Controlling what goes into or out of the cell with the help of energy is called

• active transport
• endocytosis
• passive transport
• exocytosis