Diffusion Quiz

Name: 

Homeostasis & Transport

 

 

True/False
Indicate whether the sentence or statement is true or false.
1.
Diffusion is an active process that requires a cell to expend a great deal of energy.
2.
A concentration gradient is the difference in concentrations of a substance across space.
3.
A solution outside a cell is hypotonic if its concentration of solute  molecules is lower than the
concentration of the solute molecules inside the cell.
4.
Homeostasis is the process by which molecules move toward an area of lesser concentration.
5.
Facilitated diffusion is an active form of carrier transport.
6.
The sodium-potassium pump moves sodium ions into the cell and potassium ions out of the cell.
7.
Wastes may exit a cell by pinocytosis.
8.
Ion channels are usually able to transport only one type of ion.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
9.
A cell membrane consists of phospholipids and different large molecules of
a.
protein.
c.
DNA.
b.
fat.
d.
carbohydrates.
10.
The outer surface of a cell membrane is:
a.
hydrophobic
c.
hydrophilic
b.
isotonic
d.
hypertonic
11.
Which of the following is an example of osmosis?
a.
the movement of ions from an area of greater concentration to one of  lesser concentration
b.
the movement of ions from an area of lesser concentration to one of greater concentration
c.
the movement of water through a membrane from an area of greater concentration to one of  lesser concentration
d.
the movement of water through a membrane from an area of lesser concentration to one of greater concentration
12.
Pinocytosis and phagocytosis are both examples of:
a.
plasmolysis
c.
exocytosis
b.
cytolysis
d.
endocytosis
13.
Some plants absorb mineral ions from the soil even though the soil concentration is lower than the internal cell concentration. This is due to:
a.
cytolysis
c.
diffusion
b.
active transport
d.
passive transport
14.
The pouch formed during endocytosis is called a:
a.
gate
c.
vesicle
b.
contractile vacuole
d.
channel
15.
A process that requires the addition of energy is
a.
osmosis.
c.
diffusion.
b.
active transport.
d.
facilitated diffusion.
16.
If two substances of different concentrations are present on either side of a semipermeable membrane, the substances move
a.
away from the area of lower concentration.
b.
toward the area of lower concentration.
c.
until equilibrium is reached.
d.
until all molecular motion ceases.
17.
The following are steps that occur during endocytosis.  Which is the first step that is out of order.
a.
material is taken into the cell by infolding of cell membrane
b.
the infolding forms a pocket
c.
the pocket forms a vacuole in the cytoplasm
d.
the pocket breaks loose from the cell membrane
18.
Na+ ions are transported across cell membranes of body cells by
a.
molecular pumps.
c.
simple diffusion.
b.
facilitated diffusion.
d.
passive transport.
19.
The process by which molecules of a substance move from an area of higher concentration of that substance to an area of lower concentration is known as
a.
exocytosis.
c.
endocytosis.
b.
pinocytosis.
d.
diffusion.
            Concentration of Water and Solutes in Four Adjacent Cells
            chp5_web_tutorial_files/i0220000.jpg
20.
Refer to the illustration above. In this system, solute molecules in cell “B” are most likely to
a.
remain in cell “B.”
c.
diffuse into cell “A.”
b.
adhere to cell “B’s” membrane.
d.
diffuse into cell “D”
21.
Refer to the illustration above. In this system, water molecules are most likely to diffuse in which direction?
a.
from “A” to “B”
c.
from “D” to “C”
b.
from “B” to “D”
d.
from “C” to “A”
22.
The dispersal of ink in a beaker of water is an example of
a.
diffusion.
c.
active transport.
b.
osmosis.
d.
endocytosis.
23.
Which of the following enters a cell by active transport?
a.
glucose
c.
sodium ion
b.
water
d.
potassium ion
24.
endocytosis : exocytosis ::
a.
phagocytosis : bacteria
c.
cold : hot
b.
secrete : exocytosis
d.
white blood cell : bacteria
25.
Glucose enters a cell most rapidly by
a.
facilitated diffusion
c.
osmosis
b.
diffusion
d.
phagocytosis
26.
When the cells in a plant have low turgor pressure, the plant
a.
is rigid
c.
wilts
b.
dies
d.
explodes

 

Check Your Work     Reset