Cell Transport Practice '24 - Stephen J Ryan | Biblioteka

5

For the above image, explain what will happen once you start the animation... make sure you use the terms diffusion, concentration gradient and pore (hole) size in your answer. Notice one of the particles (solutes) will diffuse and the other WILL NOT- make sure you explain why!

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9

Item 1
CO2
Item 2
O2
a lipid (nonpolar)
water
glucose (a sugar)
ions (charged atoms)

Not blocked by cell membrane - moves by simple diffusion
Blocked by the cell membrane - moves ONLY by facilitated diffusion (help of protein in membrane)
Would require an aquaporin to move across a membrane

3

Explain the ONE KEY REASON for why some molecules need the help of the special protein channel to cross the cell membrane (facilitated diffusion) and other molecules can cross directly across the cell membrane without any help (simple diffusion)

1

What is the direction of the concentration gradient for oxygen in this picture?

inside to outside

outside to inside

1

What is the direction of the concentration gradient for carbon dioxide in this picture?

from inside to outside

from outside to inside

1

What is the process by which O2 and CO2 move across the membrane called?

facilitated diffusion

simple diffusion

osmosis

active transport

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2

What is this process called? You are able to select more than 1 answer

facilitated diffusion

simple diffusion

osmosis

active transport

1

In the above picture, what will be the direction of osmosis?

inside to outside

outside to inside

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1

Explain what the aquaporin is doing here (what is its function?)

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1

Referring to the image, select all statements that are true ....

The concentration gradients of the glucose is from outside the cell to inside the cell

The glucose molecules are able to move directly across the cell membrane

This images shows an example of facilitated diffusion.

Gluts are carbohydrates that facilitate the movement of glucoses across the cell membrane

Body cells, especially muscle and fat cells, should increase the number of GLUTS in their cell membranes in response to a rise in blood sugar

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1

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3

Select all statements that correctly describe what is happening in the image

there are more H+ ions (protons) OUTSIDE the cell than inside the cell

this is passive transport

pumping the H+ protons OUT of the cell (the way the red arrow is pointing) would require ATP to energize the proton pump

this is an example of facilitated diffusion

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3

Assume the solute CANNOT move and the solvent (water) can move... What will be the direction of osmosis in this picture? Briefly explain WHY!

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3

Assume the solute CANNOT move and the solvent (water) can move... What will be the direction of osmosis in this picture? Briefly explain WHY!

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3

Assume the solute CANNOT move and the solvent (water) can move... What will be the direction of osmosis in this picture? Briefly explain WHY!

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5

Marathon runners are at risk for hyponatremia or water intoxication when they drink large amounts of water during the race. This extra water floods the blood and the fluids around their cells so there is more water OUTSIDE than INSIDE their cells. Explain what happens next using the word osmosis and explain why the BRAIN is the organ that is most affected by the movement of this extra water.