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Passive and Active Transport

Total questions: 28

Worksheet time: 19mins

Name
Class
Date
1.

Small, nonpolar, hydrophobic molecules such as fatty acids, oxygen and carbon dioxide.....

a)

easily pass through the membrane's bilayer

b)

very slowly diffuse through the bilayer

c)

require transport proteins

d)

enter through endocytosis

2.

Membrane phospholipids

a)

have hydrophobic heads that face the center of the membrane and are shielded from water

b)

have hydrophilic tails that face outward

c)

remain fluid because they are tightly packed

d)

none of these

3.

Plasma membranes are selectively permeable. This means

a)

anything can pass in and out

b)

the membrane regulates the passage of the material in and out of the cell

c)

glucose cannot enter the cell

d)

cholesterol cannot enter

4.

Which is NOT a function of the membrane?

a)

it forms a selective barrier

b)

it has receptors for chemical messages

c)

it is the control center of the cell

d)

it is involved in self recognition

5.

The cholesterol associated with membranes

a)

is attached to proteins and extends into the environment surrounding the cell

b)

helps stabilize the membrane at body temperature

c)

is an abnormality resulting from a diet high in cholesterol

d)

both a and c

6.

What is the "big idea" of the Fluid Mosaic Model of plasma membranes?

a)

the plasma membrane creates a specialized FLUID that looks like a MOSAIC.

b)

the plasma membrane is a MOSAIC.

c)

the fluid mosaic model is NOT related to the plasma membrane.

d)

a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.

7.
What is the diffusion of water only across a cell or semi-permeable membrane?
a)
Osmosis
b)
Diffusion
c)
Active Transport
d)
Passive Transport
8.
What type of cellular transport uses energy?
a)
Passive Transport
b)
Active Transport
9.
In which case would a cell most likely shrink?
a)
when placed in a solution containing a high salt concentration
b)
when placed in a isotonic solution
c)
when placed in a solution containing a low pH
d)
when placed in a solution containing distilled water
10.
Active transport requires energy because...
a)
The cell is moving something against a concentration gradient
b)
The cell is moving something with a concentration gradient
11.
A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?
a)
Water moved into the lettuce cells by active transport.
b)
Water moved into the lettuce cells by osmosis.
c)
Salt moved into the lettuce cells by diffusion.
d)
Water moved out of the lettuce cells by osmosis.
12.
_______ regulates what enters and leaves a cell.  
a)
Cell Membrane
b)
Nucleus
c)
Mitochondria
d)
Cytoplasm
13.
What does "bilayer" mean?
a)
one layer
b)
two layers
c)
laminated
d)
bilateral
14.

True or False: In simple diffusion, molecules move from high concentration to low concentration across a membrane.

a)

True

b)

False

15.

Draw a circle around the section that demonstrates equilibrium.

16.
What is the definition of  Selective Permeability?
a)
The movement of materials across the cell membrane that requires NO ENERGY from the cell.
b)
The movement of materials through (or across) the cell membrane
c)
The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
d)
The movement of molecules from an area of high concentration (where the molecules are more crowded together) to a area of low concentration (where molecules are more spread apart)
17.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water
18.

Passive Transport means

a)

Energy is used

b)

No energy is used

c)

Energy is created

19.
What type of transport is this?
a)
Endocytosis
b)
Diffusion
c)
Exocytosis
d)
Osmosis
20.

Cells sometimes use energy to transport materials across the cell membrane.  This is called

a)

Endocytosis

b)

Facilitated Diffusion

c)

Active Transport

d)

Osmosis

21.
Solutes move against the concentration gradient
a)
Passive Transport
b)
Active Transport
22.
What is the difference between active and passive transport?
a)
Active does not need energy and passive uses ATP (energy)
b)
Active uses ATP (energy) and passive does not need energy
c)
Active stores transport proteins and passive releases 
d)
Active uses hormones and passive does not 
23.

White blood cells engulfing invading bacteria is an example of

a)

Endocytosis

b)

Exocytosis

c)

Diffusion

d)

Facilitated Diffusion

24.

Cellular energy required for active transport comes directly in the form of _________.

a)

glucose

b)

lipids

c)

ATP

d)

NADPH

25.

Endocytosis is a process of a cell bringing things into the cell. This is a(n) ____________ process.

a)

active

b)

passive

c)

hypotonic

d)

isotonic

26.

Macromolecules are often too large to fit through the cell membrane or membrane proteins. Cells can transport these molecules by packaging them in small membrane sacs called _____________.

a)

lysosomes

b)

golgi bodies

c)

vesicles

d)

ribosomes

27.

Does not use energy from the cell (select all that apply)

a)

diffusion

b)

osmosis

c)

facilitated diffusion

d)

active transport

28.

This red blood cell swell and burst in a ....solution

a)

hypotonic

b)

isotonic

c)

elektronic

d)

hypertonic