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WorksheetsTEKS 4B-Osmosis
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes
a)
water to move into the cell.
b)
water to move out of the cell.
c)
solutes to move into the cell.
d)
solutes to move out of the cell.
2.
Which means of particle transport is shown in the diagram?
a)
endocytosis
b)
exocytosis
c)
facilitated diffusion
d)
protein pump
3.
Selectively permeable membranes are important in cell function. What makes a membrane selectively permeable?
a)
The ability to remove bacteria from the cell
b)
The ability to use energy to make proteins used in the cell
c)
The ability to modify, sort, and package proteins and lipids for storage or transport out of the cell
d)
The ability to allow needed materials to enter and wastes to exit as well as the ability to block unneeded materials from entering the cell
4.
What happens during diffusion?
a)
Particles move slightly but stay in almost the same place.
b)
Particles move to different areas but always return to their starting point.
c)
Particles move from an area that is more concentrated to an area that is less concentrated.
d)
Particles move from an area that is less concentrated to an area that is more concentrated.
5.
What material diffuses across a selectively permeable membrane from an area of higher concentration to an area of lower concentration through the process of osmosis?
a)
Lipid
b)
Protein
c)
Salt
d)
Water
6.
What is the difference between diffusion and facilitated diffusion?
a)
Diffusion occurs when molecules spread out by moving randomly, while facilitated diffusion occurs when protein channels help molecules move across the cell membrane.
b)
Facilitated diffusion occurs when molecules spread out by moving randomly, while diffusion occurs when protein channels help molecules move across the cell membrane.
c)
There is no real difference between the two, except that facilitated diffusion happens slightly faster than diffusion.
d)
There is no real difference between the two, except that diffusion happens slightly faster than facilitated diffusion.
7.
Which of the following accurately describes facilitated diffusion?
a)
Facilitated diffusion is the movement of substances requiring the use of energy.
b)
Facilitated diffusion does not involve the movement of substances across a membrane.
c)
Facilitated diffusion is the movement of substances in a slower, more deliberate way than diffusion.
d)
Facilitated diffusion is the movement of substances that cannot directly diffuse across the cell membrane.
8.
Into which two subcategories can bulk transport be divided?
a)
Endocytosis and osmosis
b)
Endocytosis and exocytosis
c)
Exocytosis and passive transport
d)
Osmosis and facilitated diffusion
9.
Endocytosis is a process by which cells
a)
bring bulk material into the cell via vesicles.
b)
bring bulk material into the cell via pores.
c)
remove bulk material from the cell via vesicles.
d)
remove bulk material from the cell via pores.
10.
Which of the following is not a way in which cells maintain homeostasis?
a)
They take in water and release waste.
b)
They respond to stimuli in their environment.
c)
They allow water to build up within their membranes.
d)
They maintain concentrations of water and minerals within certain levels.
11.
How do unicellular organisms maintain homeostasis?
a)
They grow and reproduce.
b)
They transform energy.
c)
They respond to changes in their environment.
d)
All the other answers are correct
12.
The contractile vacuole is an organelle found in paramecia, a group of unicellular organisms. Contractile vacuoles pump out fresh water that accumulates in the organisms by osmosis. If the contractile vacuoles did not perform this function, could the paramecia maintain homeostasis?
a)
No, because the excess water would accumulate and burst the cell.
b)
Yes, because the paramecia would simply become bigger organisms.
c)
Yes, because just like all living things, paramecia need water to survive.
d)
No, because the excess water would create a balance between the inside and outside of the cell.
13.
The diagram models a form of active transport called molecular transport.In what way is molecular transport similar to facilitated diffusion?
a)
It requires an input of energy.
b)
It is used to move water in and out of cells.
c)
It involves proteins that act as channels or carriers.
d)
It moves materials against a concentration gradient.
14.
What are the two major types of active transport?
a)
Molecular transport and exocytosis
b)
Endocytosis and bulk transport
c)
Molecular transport and bulk transport
d)
Exocytosis and endocytosis
15.
How is active transport different from passive transport?
a)
Both active and passive transport occur within plant cells, but only active transport occurs within animal cells.
b)
Both active and passive transport occur within animal cells, but only active transport occurs within plant cells.
c)
Passive transport uses energy to move materials across a cell membrane against a concentration gradient, while active transport moves materials across a cell membrane in the direction of a concentration gradient, without using energy.
d)
Active transport uses energy to move materials across a cell membrane against a concentration gradient, while passive transport moves materials across a cell membrane in the direction of a concentration gradient, without using energy.
16.
What information could be added to make this diagram a more complete model of osmosis in red blood cells?
a)
Information about the temperatures of the cell and of the solution.
b)
The relative concentrations of solute inside and outside the cell.
c)
Show that energy is required for the osmosis to occur.
d)
Show the cell holding its shape as osmosis occurs.
17.
True or False/Why?
Once equilibrium is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentration on either side of the membrane.
Once equilibrium is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentration on either side of the membrane.
a)
False, because the molecules stop moving
b)
False, because you never get the same concentrations on either side of the membrane
c)
False, because molecules don't move, the water moves
d)
True
18.
Moving materials from an area of low concentration to an area of high concentration requires active transport
a)
True
b)
False, bulk transport
c)
False, passive transport
d)
False, facilitated diffusion
19.
Molecules tend to move from an area where they are more concentrated to an area where they are less concentrated. This process is called ____________________.
a)
passive transport
b)
Brownian motion
c)
diffusion
d)
osmosis
20.
Large molecules, such as glucose, that cannot cross the lipid bilayer can still move across the membrane through a type of passive transport called _________________________.
a)
Endocytosis
b)
Active transport
c)
Facilitated diffusion
d)
Bulk transport
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