SME
Grade 9 Science
Cell membranes and transport: diffusion, osmosis and active transport
The main lesson, then each kind of problem it solves.
Cell membranes and transport: diffusion, osmosis and active transport
Main lesson
The sodium–potassium pump
Use this for “How many Na⁺ and K⁺ ions does the pump move for 2 ATP?”
Which kind of transport is it?
Use this for “Is it passive or active transport, and does it need a protein?”
Cells in hypotonic, isotonic and hypertonic water
Use this for “Onion cells in salt water shrink from their walls. Why?”