Question

practice: types of cellular transport
read each statement and place a check - mark in the column of the correct choice.
part 1: passive vs. active

1. materials move down a concentration gradient.
2. requires energy.
3. materials move against the concentration gradient.
4. materials move from high concentration to low concentration.
5. tends to move small, nonpolar molecules across the cell membrane.
6. tends to move large, polar molecules across the cell membrane.

part 2: types of transport (check all columns that apply. some may be checked more than once.)

1. moves water.
2. involves a protein channel.
3. moves small particles like o₂ and co₂.
4. involves a vesicle.
5. moves ions.

part 3: types of osmotic solutions (some columns may be checked more than once.)

1. causes cell to shrivel.
2. same osmotic concentration as the cell.
3. higher osmotic concentration than the cell.
4. causes water to move into the cell.

cells unit

Explanation:

1. Passive transport moves materials down a concentration gradient (from high to low), doesn't require energy and is good for small non - polar molecules. Active transport moves against the concentration gradient and requires energy, and is used for large polar molecules.
2. Osmosis moves water, facilitated diffusion involves a protein channel, diffusion moves small particles like O₂ and CO₂, endocytosis and exocytosis involve a vesicle, and molecular pumps move ions.
3. A hypertonic solution has a higher osmotic concentration than the cell and causes the cell to shrivel. An isotonic solution has the same osmotic concentration as the cell. A hypotonic solution has a lower osmotic concentration and causes water to move into the cell.

Answer:

1. Passive
2. Active
3. Active
4. Passive
5. Passive
6. Active
7. Osmosis
8. Facilitated Diffusion
9. Diffusion
10. Endocytosis, Exocytosis
11. Molecular Pumps
12. Hypertonic Solution
13. Isotonic Solution
14. Hypertonic Solution
15. Hypotonic Solution