These notes should be copied into your spiral notebooks. Being absent means you copy them at home. This assignment may be used in a spiral notebook check. You are responsible for studying this information for you Chapter 2 Test (part two) for Dec. 15th.
Small molecules pass through a membrane by a process called passive transport
2.What is a semipermeable membrane?
3.What is the advantage of passive transport?
Needs to use active transport to take in nutrients that have a lower concentration outside the cell or to get rid of wastes that have a lower concentration inside the cell.
1. What caused the concentration of dye to change in the beakers?
The dye moved through the membrane from the higher concentration side to the lower concentration side.
2. What do you think would happen if the dye had been added to both sides of the membrane?
The water and dye would move in both directions through the membrane until there were equal concentrations on both sides.