diffusion

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

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 
  

How do the particles move in diffusion?

• From a region of low concentration to a region of high concentration

• From a region of high concentration to a region of low concentration

• From a region of low concentration to a region of low concentration

• From a region of high concentration to a region of high concentration

Diffusion occurs only in solids

• True

• False

What does a 'region with high concentration' mean?

• An area with a SMALL number of particles

• An area with a LARGE number of particles

• An area with an UNEVEN number of particles

• An area with no particles

An increase in temperature does what to diffusion?

• Speeds it up
• Slows it down
• Has no effect
• I wish i knew. Really I do.

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

_______ regulates what enters and leaves a cell.  

• Cell Membrane
• Nucleus
• Mitochondria
• Cytoplasm

Which type of passive transport uses proteins to help molecules pass through the membrane?

• Diffusion
• Facilitated diffusion
• Osmosis
• All of the above

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
• Homeostasis