Osmosis Tutorial

Click on the correct answer



1 Which of the following would be an example of simple diffusion?
the smell of ammonia spreading throughout the room
water being poured into a glass
blood cells shrinking when placed in salt water
turgor pressure in plant cells
2 Which of the following would be an example of osmosis?
the smell of ammonia spreading throughout the room
the shriveling of a snail after salt is poured on it
water being poured into a glass
the absorption of water by a bathroom sponge
3 A state of biological balance maintained by living organisms is called .....
phagocytosis
osmosis
cytolysis
homeostasis
4 The part of the cell that is most important in maintaining homeostasis with the cell's environment is the ...
nucleus
cytoplasm
DNA
cell membrane
5 Which prefix means "greater than"?
hypo
hyper
iso
plasmo
cyto
6 When the process of diffusion reaches an equilibrium state:
the movement of all molecules stops
molecules continue to move but in equal amounts
a further exchange of molecules ceases
a hypotonic solution is formed
7 Red blood cells contain 0.9% salt. Which of the following solutions would be hypotonic to the blood?
9%
0.9%
0.09%
1.9%
8 The bursting of cells due to osmosis is called ....
plasmolysis
hypertonic
cytolysis
turgor
9 The pressure that builds up in plant cells due to osmosis and the strength of the cell walls is called ...
plasmolysis
hypertonic
cytolysis
turgor
10 Sea water is approximately 3% salt. Sea water is hypertonic to the tissues of freshwater fish. Therefore we can conclude that the tissues contain .......% salt.
3%
greater than 3%
less than 3%
none of these
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 .....
plasmolysis
turgor
cytolysis
contractile vacuoles
12 Red blood cells contain 0.9% salt. Which of the following solutions would be isotonic solutions to the blood?
9% salt
0.9% salt
0.09% salt
0% salt
none of these
13 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 solf. From this we can deduce that the freshwater is ______ and the saltwater is ________ to the cells of the carrot sticks.
hypotonic / hypotonic
hypertonic / hypotonic
hypotonic / hypertonic
hypertonic / hypertonic
14 In an attempt to replenish the body fluids, a patient (who has had serious hemorrhage) accidentally receives a large transfusion of distilled water directly into one of his veins. This would probably .....
have no unfavorable effect as long as the water was sterile
have serious, perhaps fatal effects because there would be too much fluid for the heart to pump.
have serious, perhaps fatal effects because the red blood cells would tend to shrivel
have serious, perhaps fatal effects because the red blood cells would tend to burst
15 A solution that contains a higher level of salts than found in cells is said to be .....
hypertonic
hypotonic
isotonic
catatonic
16 A beacher is divided into two halves, A & B by a membrane freely permeable to the water but not to glucose. Side A is filled with a solution of water with 2% glucose, while side B is filled with water and 4% glucose. Which best describes what will happen to this system.
water will move from A to B
water will move from B to A
water will move equally in both directions
water will move in both directions but mostly from A to B
water will move in both directions but mostly from B to A
17 Movement of substances across the membrane without the use of cellular energy is termed ......
active transport
carrier transport
passive transport
the sodium-potassium pump
18 The process of facilitated diffusion requires
carrier proteins
no input of energy from the cell
a downhill gradient
all of these
none of these
19 One common example of active transport is ....
the diffusion of glucose across a membrane
the sodium-potassium pump
osmosis
plasmolysis
20 Both facilitated diffusion and active transport make use of carrier molecules that change shape and move substances through the membrane. These molecules are made of .....
hydrophobic lipids
carbohydrates
proteins
hydrophilic lipids
21 Substances that are much too large to pass through the cell membrane may still get into the cell through the process of .....
endocytosis
exocytosis
facilitated diffusion
active transport
osmosis
22 The engulfing or swallowing of large objects by amebas or white blood cells is called .....
exocytosis
pinocytosis
phagocytosis
oxytosis
23 Which one of the following DOES NOT BELONG?
Passive
Active
Facilitated diffusion
Osmosis
24 Which of the following cell structures are involved in exocytosis involving packaged proteins?
cell membrane
golgi apparatus
ribosomes
all of these
25 A beaker is divided into two halves, A & B, by a membrane that is freely permeable to the water and NaCl but not to protein. Side A is half-filled with a solution of 8% protein, while side B is half filled with a 2% protein solution. After time goes by, it is found that in side A ......
the number of protein molecules has increased
the number of water molecules has decreased
the number of water molecules has increased
the percentage of water has decreased