NAME: ______DATE: ______
DIFFUSION, FACILITATED DIFFUSION, and OSMOSIS
Answer the following Multiple Choice questions by selecting the best answer.
1. Which of the following would be an example of simple diffusion?
a. the smell of ammonia spreading throughout the room
b. water being poured into a glass
c. blood cells shrinking when placed in salt water
d. turgor pressure in plant cells
2. Which of the following would be an example of osmosis?
a. the smell of ammonia spreading through the room
b. the shriveling of a snail after salt is poured on it
c. water being poured into a glass
d. the absorption of water by a sponge
3. A state of biological balance maintained by living organisms is called....
a. phagocytosis
b. osmosis
c. cytolysis
d. homeostasis
4. The part of the cell that is the most important in maintaining homeostasis with the cell's environment is the
a. nucleus
b. cytoplasm
c. DNA
d. cell membrane
5. Which prefix means "greater than"
a. hypo
b. hyper
c. iso
d. plasmo
6. When the process of diffusion reaches a state of equilibrium:
a. molecular movement stops
b. molecules move in equal amounts and opposite direction
c. a hypotonic solution is formed
d. molecules continue to diffuse as they did prior to reaching equilibrium
7. Red Blood cells contain 0.9% salt. Which of the following solutions would be hypotonic to these cells?
a. 9% Salt Solution
b. 0.9% Salt solution
c. 0.09% Salt Solution
d. 1.9% Salt Solution
8. The bursting of cells due to osmosis is called
a. plasmolysis
b. hypertonic
c. cytolysis
d. turgor
9. The pressure that builds up in a plant cell due to osmosis and the strength of the cell wall which keeps fruit plump is called
a. plasmolysis
b. hypertonic
c. cytolysis
d. turgor
10. Sea water is approximately 3% salt. Sea water is hypertonic to the tissues of freshwater fish. Therfor we
can conclude that the tissues contain ______% salt.
a. 3%
b. greater than 3%
c. less than 3%
d. none of the above
11. Unicellular freshwater organisms find themselves in a hypotonic solution. In order to get rid of excess water that diffuses into the cells, these organisms use
a. osmosis
b. ribosomes
c. cytolysis
d. contractile vacuoles
12. Carrot sticks that are left in a dish of freshwater for several hours become stiff and hard. similar sticks left in a saltwater solution become limp and soft. from this we can deduce that the freshwater is ______and the saltwater is ______the carrot cells.
a. hypotonic/hypotonic
b. hypertonic/hypotonic
c. hypotonic/hypertonic
d. hypertonic/hypertonic
13. In an attempt to replenish body fluids, a patient who is severely dehydrated accidentally receives an IV of distilled water directly into one of his veins. This would probably
a. have no unfavorable effect
b. have serious, possibly fatal effects as the heart would have too much blood to pump.
c. have serious, possibly fatal effects because the red blood cells would shrivel
d. have serious, possibly fatal effects as red blood cells would burst
14. A beaker is divided into two halves, A & B by a membrane which is permeable to water but not to glucose. Side A is filled with a 2% glucose and water solution, while side B is filled with a 4% glucose and water solution. Which best describes what will happen to this system? (Use the space to make a drawing if it will help)
a. Water will move from A to B
b. Water will move from B to A
c. Water will move equally in both directions
d. Glucose will move from B to A
15. When sugar is sprinkled over strawberries they become juicy and soft. How can we describe the state of their cells.
a. flaccid
b. normal
c. turgid
d. swollen
16. The cell membrane is made of a phospholipid bilayer. The phospholipids have phosphate heads that are said to be ______or ______and fatty acid tails that are described as ______or ______.
a. polar/hydrophobic, non-polar/hydrophilic
b. polar/hydrophilic, non-polar/hydrophobic
c. non-polar/hydrophobic, polar/hydrophilic
d. non-polar/hydrophilic, polar/hydrophobic
17. Osmosis is a type of ______which requires the use of protein channels called ______
a. simple diffusion, exocytosis
b. facilitated diffusion, aquaporins
c. active transport, protein pumps
d. endocytosis, pinocytosis
Use the following diagram to answer questions 18-21 in the space provided. The cell membrane is only permeable to water, not salt.
18. What is the intracellular concentration of NaCl and the extracellular concentration of water in this diagram?
a. 5 PPT and 90 PPT
b. 90 PPT and 10 PPT
c. 10 PPT and 995 PPT
d. 5 PPT and 990 PPT
19. What kind of solution is this cell floating in?
a. Hypertonic
b. Hypotonic
c. Isotonic
d. cytolytic
20. In which direction will water move in this diagram.
a. From inside the cell to outside the cell
b. From the outside environment into the cell
c. It will move equally in both directions
d. no movement as the cell is in equilibrium
21. After time elapses what will happen to the cell
a. no change, it is in equilibrium
b. it will lose water and shrivel
c. it will gain water and lyse
d. it will lose water and become turgid
Use the following diagram to answer questions 22-25 in the space provided. The cell membrane is only permeable to water, not glucose.
22. What is the intracellular concentration of Glucose and the extracellular concentration of water in this diagram?
a. 3% and 97%
b. 9% and 97%
c. 3% and 91%
d. 97% and 9%
23. What kind of solution is this cell floating in?
a. Hypertonic
b. Hypotonic
c. Isotonic
d. cytolytic
24. In which direction will water move in this diagram.
a. From inside the cell to outside the cell
b. From the outside environment into the cell
c. It will move equally in both directions
d. no movement as the cell is in equilibrium
25. After time elapses what will happen to the cell
a. no change, it is in equilibrium
b. it will lose water and shrivel
c. it will gain water and lyse
d. it will lose water and become turgid