1. Transport Across the Cell Membrane
Passive vs. Active Transport

2. I. Passive Transport Is energy (ATP) required? _____
Moves molecules across the membrane ________ a concentration gradient.
From ________ concentration to _______ concentration. NO
DOWN
HIGH
LOW

3. Easy Breezy

4. Passive Transport Osmosis Equilibrium Equilibrium
High to Low concentration
Equilibrium
High to Low concentration assisted proteins
Equilibrium
Water moves both ways
Cell doesn’t change in size
Osmosis
Water moves into the cell
Cell swells & bursts (lysis)
Osmosis
Water moves out of the cell
Cell shrinks (shrivels)

5. II. Active Transport Is energy (ATP) required? _____
Moves molecules across the membrane ________ a concentration gradient.
From ________ concentration to _______ concentration.
YES
AGAINST
LOW
HIGH

6. Sooooo Tired

7. Active Transport Type Movement Protein Pump Endocytosis Exocytosis
Ions are pumped out of the cell, while other ions are brought in
(Ex. Na+ & K+)
Large molecules are engulfed by the membrane (brought into the cell)
Large molecules are secreted (exit the cell) by the membrane

8. Do #1-5 on back of notes page.
STUDENT PRACTICE
Do #1-5 on back of notes page.

9. Freshwater moves into a paramecium
Active or Passive? _______________
Method: _________________
PASSIVE
OSMOSIS

10. 2. Carrier proteins transport glucose into a muscle cell.
Active or Passive? _______________
Method: ____________________
high
low
PASSIVE
FACILITATED DIFFUSION

11. 3. An amoeba engulfs a large particle of food.
Active or Passive? _______________
Method: _________________
ACTIVE
ENDOCYTOSIS

12. 4. Oxygen molecules move from the lungs into the bloodstream.
Active or Passive? _______________
Method: ____________________
high
low
PASSIVE
DIFFUSION

13. 5. Sodium ions are pumped out of a red blood cell.
Active or Passive? _______________
Method: ____________________
low
high
ACTIVE
PROTEIN PUMP

14. 6. Proteins are secreted from a cell.
Active or Passive? _______________
Method: ____________________
ACTIVE
EXOCYTOSIS