Question

statement 1. the concentration of dissolved substances (stuff) in the solution is lower than the concentration inside the cell. 2. when a cell is placed in this solution, water will enter the cell by osmosis resulting in osmotic (turgor) pressure. 3. the concentration of dissolved substances (stuff) in the solution is the same as the concentration inside the cell. 4. the concentration of dissolved substances (stuff) in the solution is higher than the concentration inside the cell. 5. when this solution is injected into the body no cell disruption occurs because no net osmosis occurs. 6. putting a plant in this solution will result in water loss and cause the plant to wilt. 7. in a hypotonic solution, animal cells experience osmosis and a pressure builds up in the cell. what causes the pressure? how is the cell potentially affected by this situation? 8. why does a plant like celery get limp when placed in a hypertonic solution? 9. a salt water protozoan(a single celled protest) is transferred to a freshwater lake. what might happen to the protozoan? 10. in the figure of the u - tube below, side “a” is pure water and side “b” is a 10% starch solution. why is the level of side “b” rising? which side is hypertonic compared to the other? 11. pure water is always what (hypertonic, hypotonic, or isotonic) compared to any cell? why?

Explanation:

Step1: Recall definitions of tonicity

Isotonic - equal solute concentration inside and outside cell. Hypotonic - lower solute concentration outside cell. Hypertonic - higher solute concentration outside cell.

Step2: Match statements to tonicity

1. Hypotonic - lower solute outside.
2. Hypotonic - water enters in hypotonic, creating turgor pressure.
3. Isotonic - equal solute concentrations.
4. Hypertonic - higher solute outside.
5. Isotonic - no net osmosis in isotonic.
6. Hypertonic - water loss in hypertonic causes wilting.

Step3: Answer questions 7 - 11

1. In hypotonic solution, water enters by osmosis, increasing pressure. Animal cells may burst (lysis).
2. In hypertonic solution, water leaves plant cells (celery), causing loss of turgor and limpness.
3. Salt - water protozoan in freshwater (hypotonic) will have water enter, may burst.
4. Side B (10% starch) is hypertonic to side A (pure water). Water moves from A to B by osmosis, raising level of B.
5. Pure water is hypotonic to any cell as it has lower solute concentration.

Answer:

1. Hypotonic
2. Hypotonic
3. Isotonic
4. Hypertonic
5. Isotonic
6. Hypertonic
7. Water enters by osmosis causing pressure; cell may burst.
8. Water leaves plant cells due to hypertonic solution, causing loss of turgor.
9. Water will enter the protozoan and it may burst.
10. Side B is hypertonic; water moves from A to B by osmosis, raising B's level.
11. Hypotonic because it has lower solute concentration than any cell.