Passive+or+Active+Transport+(Paper+Model+in+Action!)


 * __ Passive or Active Transport __**

Step 1: Color the molecules that need to move through your plasma membrane according to this guide. You will need PINK, YELLOW and BLUE.


 * Color all of the WATER MOLECULES according to the key (H’s + Blue, O’s – Pink)
 * Color all of the OXYGEN, CARBON DIOXIDE and HORMONE molecules YELLOW (nonpolar)
 * Color all of the GLUCOSE molecules half PINK, half BLUE (polar)
 * Color the SODIUM (Na+) and POTASSIUM (K+) ions BLUE (+ Polar)
 * Color the LARGE PROTEIN by region (+Blue, N Yellow, - Pink) stay in the lines!

Step 2: Get a sheet of notebook paper and number 1-7.

Step 3: Cut out the four WATER molecules. Place them on the Extracellular side of your membrane. Water is a polar molecule but it is also electrically neutral. Therefore it can pass through the membrane with no trouble. Balance your water molecules by moving some of them across your membrane so that there are the same on both sides of the membrane. Include the existing water molecules in your balancing. Glue them down.

Answer on your paper: Question #1 – Is the movement of water across the membrane PASSIVE or ACTIVE TRANSPORT?

Step 4: Cut out the four OXYGEN molecules. Place them on the Extracellular side of your membrane. Oxygen is a small nonpolar molecule. Therefore it can pass through the membrane with no trouble. Balance your oxygen molecules by moving some of them across your membrane so that they are equal on both sides of the membrane. Glue them down.

Question #2 – Is the movement of oxygen across the membrane PASSIVE or ACTIVE TRANSPORT?

Step 5: Cut out the four CARBON DIOXIDE molecules. Place them on the INTRACELLULAR side of your membrane. Carbon dioxide is a small nonpolar molecule. Therefore it can pass through the membrane with no trouble. Balance your carbon dioxide molecules by moving some of them across your membrane so that they are equal on both sides of the membrane. Glue them down.

Question #3 – Is the movement of carbon dioxide across the membrane PASSIVE or ACTIVE TRANSPORT?

Step 6: Cut out the four HORMONE molecules. Place them on the EXTRACELLULAR side of your membrane. Hormones are small nonpolar signaling molecules. Therefore they can pass through the membrane with no trouble. Balance your hormone molecules by moving some of them across your membrane so that they are the same on both sides of the membrane. Glue them down.

Question #4 – Is the movement of hormones across the membrane PASSIVE or ACTIVE TRANSPORT?

Step 7: Cut out the four GLUCOSE molecules. Place them on the Extracellular side of your membrane. Glucose is a polar molecule but it is also electrically neutral. It is much larger than water, oxygen or carbon dioxide, however. Therefore it needs a protein to help transport it. Balance your glucose molecules by moving some of them through the appropriate transport protein so that they are the same on both sides of the membrane. Glue them down.

Question #5 – Is the movement of glucose across the membrane PASSIVE or ACTIVE TRANSPORT?

Step 8: Cut out the four SODIUM and POTASSIUM ions. Place them on the Extracellular side of your membrane. Ions are extremely POLAR molecules and require a PROTEIN PUMP and LOTS OF ENERGY to pass through a membrane. Cells typically have to FORCE ions to enter on PURPOSE. Force your ions through the appropriate transport protein so that they are all inside of the membrane. Glue them down.

Question #6 – Is the movement of ions across the membrane PASSIVE or ACTIVE TRANSPORT?

Step 9: Cut out the LARGE PROTEIN molecule. Place it on the Extracellular side of your membrane. Glue it down on the extracellular side of the membrane with a question mark (?) next to it.

Question #7 - How is it going to get through the membrane? Will this be Passive or Active Transport? Question #8 – What are three factors that control the passage of substances across the Plasma Membrane? Question #9 - Compare and contrast Passive and Active Transport with a graphic organizer.

Step 10: Turn in your completed DIY model and questions! GREAT WORK!