I- Bio: 8.3 -8.4 Cell Transport + Levels of Organization

8.3 - What is diffusion?

• when molecules move

• when molecules move from a high concentration to a low.

• no movement

• molecules move everywhere

8.3 Where is there a low concentration of dye?

• at the bottom of cup

• in the color

• at the top of cup

• no concentration gradient

8.3 - The picture below is an example of _________________.

• osmosis

• isotonic

• diffusion

• active transport

8.3 - Osmosis is the movement of _____ across a membrane.

• food

• energy

• oxygen

• water

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

• Osmosis

• Cell wall

• Diffusion

• Respiration

8.3 - Where is there a high concentration of water?

• in the flower

• cannot be determined by picture.

• in the vase

• in the leaves

8.3 - 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

8.3 - What does a cell need to transport particles by active transport?

• Sun

• Wind

• Energy

• Channels

8.3 - A person would never have pure water put into their veins in a hospital because this is a __________ solution and their cells would _________________

• hypertonic, Shrink/Dehydrate

• hypertonic, expand

• hypotonic, Shrink/Dehydrate

• hypotonic, expand

8.3 - A person should never drink salty water because this is a __________ solution and their cells would _________________

• hypertonic, shrink

• hypertonic. expand

• hypotonic, shrink

• hypotonic, expand