Question

part iii. types of transport
for each of the statements below, indicate if it applies to process a, b, or c by recording the letter on the line provided. some statements apply to more than one image

1. _____ represents active transport
2. _____ does not require energy
3. _____ requires energy
4. _____ represents facilitated diffusion
5. _____ represents simple diffusion
6. _____ oxygen gas can move by this process
7. _____ large molecules can enter a cell by this process
8. _____ moves molecules with their concentration gradient
9. _____ moves molecules against their concentration gradient

part iv. osmosis
for each of the images below, indicate if it represents a cell in a hypertonic solution, hypotonic solution, or an isotonic solution by filling in the space beneath each image. then, defend your selection and indicate the result of this type of solution on the cell.

Explanation:

1. Active transport requires energy and moves molecules against the concentration gradient. Process C shows molecules being moved against the gradient with the help of a protein and energy input.
2. Simple diffusion (Process A) and facilitated diffusion (Process B) do not require energy as they move molecules with the concentration gradient.
3. Active transport (Process C) requires energy.
4. Facilitated diffusion uses a protein channel to move molecules with the concentration gradient, which is Process B.
5. Simple diffusion is the movement of small non - polar molecules like oxygen gas through the lipid bilayer without the help of proteins, which is Process A.
6. Oxygen gas can move by simple diffusion (Process A).
7. Large molecules can enter a cell by facilitated diffusion (Process B) with the help of a protein channel.
8. Simple diffusion (Process A) and facilitated diffusion (Process B) move molecules with their concentration gradient.
9. Active transport (Process C) moves molecules against their concentration gradient.

For osmosis part:

• In a hypertonic solution, there is a higher solute concentration outside the cell, so water moves out of the cell, causing it to shrink.
• In a hypotonic solution, there is a lower solute concentration outside the cell, so water moves into the cell, causing it to swell or burst.
• In an isotonic solution, the solute concentration is the same inside and outside the cell, so there is no net movement of water and the cell maintains its shape.

Answer:

1. C
2. A, B
3. C
4. B
5. A
6. A
7. B
8. A, B
9. C

(For osmosis part, without seeing the actual images, we can't give specific answers. But the general explanations are as above. If we assume the first image has more solute outside, it's hypertonic, cell shrinks; second has more solute inside, it's hypotonic, cell swells; third has equal solute inside and outside, it's isotonic, cell maintains shape)