1. 3.5 Active Transport, Endocytosis, and Exocytosis
MA 2.1 Explain the role of cell membranes as a highly selective barrier (diffusion, osmosis, facilitated diffusion, active transport).

2. *two page notebook format*
Do Now:
1) Compare and contrast an escalator and an elevator.
Thursday, October 1, 2015
Topic: Active Transport across a cell membrane
Objectives:
Describe active transport
Distinguish among endocytosis, phagocytosis, and exocytosis.
Agenda
Homework check 3.4
Video – active and passive transport
Notes & problems 3.5

3. Compare and contrast: escalator and elevator

4. Moving materials against the concentration gradient
Escalator is like active transport
Elevator is like endocytosis/exocytosis
Proteins can move materials in a pathway
Energy is used to move from LOWER to HIGHER concentration – against the concentration gradient
Materials become MORE concentrated – ions, glucose, etc.
The membrane itself can surround material in little packages to move it. Usually large substances, or large amounts at one time.
Endocytosis moves things into the cell – phagocytosis is the special name for “cell eating”
Exocytosis moves things out of the cell.

5. Video illustration
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6. Classwork/Homework
Complete pages of your student book during class
Complete Chapter 3 review, page 51
If you have not yet shared your cell project to me, do so now!