Name Date Period

Cellular TransportComplete the table by checking the correct column for each statement.

Statement Isotonic solution

Hypotonic Solution

Hypertonic Solution

1. Causes a cell to swell

2. Doesn’t change the shape of a cell

3. Causes osmosis

4. Causes a cell to shrink

Use each of the terms below just once to complete the passage.

Glucose Plasma Membrane Homeostasis

Organism Balance Selective permeability

Living cells maintain a (8) by controlling materials that enter and leave. Without this

ability, the cell cannot maintain (9) and will die. The cell must regulate internal

concentrations of water, (10) , and other nutrients and must eliminate waste products.

Homeostasis in a cell is maintained by the (11) , which allows only certain

particles to pass through and keeps other particles out. This property of a membrane is known as

(12) .

Answer the following questions in complete sentences.

13. Does osmosis occur if a cell is placed in an isotonic solution?

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14. Why does water enter a cell that is placed in a hypotonic solution?

15. What happens to the pressure inside a cell that is placed in a hypertonic solution?

16. What can happen to animal cells when placed in a hypotonic solution? Explain.

17. What causes a plant to wilt?

Study the diagrams of the cells. Then circle the word that best completes each sentence.

18. Placing a cell in a hypertonic solution causes the cell to (swell, shrink, stay the same).

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19. Placing the cell in an isotonic solution causes the cell to (swell, shrink, stay the same).

20. Placing the cell in an hypotonic solution causes the cell to (swell, shrink, stay the same).

Examining Cause and EffectCells regulate the kinds and amounts of materials that enter and leave the cytoplasm. This regulation maintains the cytoplasm’s chemical balance.

A. Study the graphs below. Then answer the questions below.

21. Which graph illustrates an initially hypertonic cell?

22. Which graph illustrates an initially hypotonic cell? 24. In graph A, what caused the drop in the

line from one to five minutes?

23. In graph B, the line continues horizontally for several minutes. What does this indicate?

Select the best answer. Write your answer in the space provided.

24. As a result of diffusion, the concentration of many substance

a) always remains greater inside a membrane

b) eventually becomes balanced on both sides of a membrane

c) always remains greater on the outside of a membrane

d) becomes imbalanced on both sides of a membrane

25. Diffusion takes place

a) only through a lipid bilayer memebrane

b) from an area of low concentration to an area of high concentration

c) only in lipids

d) from an area of high concentration to and area of low concentration

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26. The dispersal of ink in a beaker of water is an example of

a) diffusion b) osmosis c) active transport d) endocytosis

In a complete sentence answer the following questions in the space provided.

27. You are conducting osmosis experiments with a test tube of human cells in a solution. You add a teaspoon of salt to the test tube. According to the principles of osmosis, what can you predict will happen to the cell?

28. What type of solution are you dealing with in the above question?

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