B5 - The Human Body - Staying Alive

Question 1

Diffusion - __________ of _________ from an area of _____ concentration to an area of _____ concentration

Answer 1

Movement, particles, high, low

Question 2

With diffusion, it is important to remember that particles

• Will move in both _________, BUT the ___ movement is still ____ to ___ concentration
• Will spread _____ in a _____ or gas, but won’t stop _______.

Answer 2

directions, net, high, low

evenly, liquid, moving

Question 3

Cells carry out ________ reactions (e.g. Respiration), which require _________ to _____ or leave cells.

E.g. With respiration, CO2 needs to diffuse OUT of the cell and O2 needs to diffuse IN to the cell.

__________ is one of the processes used to get _______ __ and ___ of cells.

Answer 3

chemical, substances, enter

Diffusion, substances in, out