Scribd
Upload
2K views2 pages

Cell Transport Quiz

The document discusses different mechanisms of transport across the cell membrane, including: - Diffusion, which moves molecules from high to low concentration until equilibrium is reached. - Osmosis, which is the diffusion of water across a selectively permeable membrane. If a cell is placed in salt water, water will leave the cell through osmosis. - Active transport, which moves particles against a concentration gradient and requires energy. - Facilitated diffusion, which moves particles down a concentration gradient through membrane proteins without requiring energy. The plasma membrane, made up of a phospholipid bilayer, regulates transport into and out of the cell through channels and pumps made of proteins. Transport mechanisms help maintain

Uploaded by

Doreen Khrystel Gonzales
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
2K views2 pages

Cell Transport Quiz

The document discusses different mechanisms of transport across the cell membrane, including: - Diffusion, which moves molecules from high to low concentration until equilibrium is reached. - Osmosis, which is the diffusion of water across a selectively permeable membrane. If a cell is placed in salt water, water will leave the cell through osmosis. - Active transport, which moves particles against a concentration gradient and requires energy. - Facilitated diffusion, which moves particles down a concentration gradient through membrane proteins without requiring energy. The plasma membrane, made up of a phospholipid bilayer, regulates transport into and out of the cell through channels and pumps made of proteins. Transport mechanisms help maintain

Uploaded by

Doreen Khrystel Gonzales
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

CELL TRANSPORT

Multiple Choice
Identify the choice that best completes the statement
or answers the question.

____ 1. Which of the following structures serve as the


cell’s boundary from its environment?
a. mitochondrion b. chloroplast
c. cell membrane d. channel protein

____ 2. Which of the following is a function of the cell


membrane?
a. breaks down lipids, carbohydrates, and proteins
from foods Figure 1.
b. stores water, salt, proteins, and carbohydrates
c. keeps the cell wall in place
d. regulates the movement of materials into and out
of the cell

____ 3. The cell membrane contains channels and


pumps that help move materials from one side to the
other. What are these channels and pumps made of?
a. carbohydrates b. lipids
c. bilipids d. proteins

____ 5. During diffusion, when the concentration of


molecules on both sides of a membrane is the same,
the molecules will
a. move across the membrane to the outside of the
cell.
b. stop moving across the membrane.
c. continue to move across the membrane in both Figure 2
directions.
d. move across the membrane to the inside of the cell. ____ 10. Which means of particle transport is shown
in Figure 2 above?
____ 6. The diffusion of water across a selectively a. endocytosis b. exocytosis
permeable membrane is called c. facilitated diffusion d. protein pump
a. osmotic pressure. b. osmosis.
c. pinocytosis. d. active transport. ____ 11. Which of the following activities is NOT a
way that unicellular organisms maintain homeostasis?
____ 7. An animal cell that is surrounded by fresh a. reproduction b. growth
water will burst because the osmotic pressure causes c. cell specialization d. response to the environment
a. water to move into the cell.
b. water to move out of the cell. ____ 12. Which term describes the relatively constant
c. solutes to move into the particle cell. internal physical conditions of an organism?
d. solutes to move out of the cell. a. cell specialization b. homeostasis
c. organ system d. unicellularity
____ 8. Which means of transport requires input of
energy from the cell? ____13. What structure is most responsible for
a. diffusion b. osmosis maintaining cell homeostasis?
c. facilitated diffusion d. active transport a. cytoplasm b. cell wall
c. mitochondria d. plasma membrane
____ 9. Which means of particle transport is shown in
Figure 1 above? ____14. What makes up the plasma membrane (cell
a. diffusion b. osmosis membrane)?
c. facilitated diffusion d. active transport a. cholesterol layer b. enzyme layer
c. phospholipid bilayer d. protein layer
15. Which of the following is NOT a form of passive
transport?
a. facilitated diffusion b. diffusion
c. endocytosis d. osmosis

16. Diffusion continues until…?


a. equilibrium is reached b. turgor pressure is
reached c. one side has more

17. If a cell is placed in salt water, water leaves the cell


by
a. osmosis b. diffusion
c. active transport d. phagocytosis

18. A cell moves particles from a region of low


concentration to a region of high concentration by
a. facilitated diffusion b. osmosis
c. passive transport d. active transport

II. For the boxes seen below, do the calculations (each


environment must equal 100%), draw an ARROW to
illustrate the direction of water movement. State
whether the solution is hypertonic, hypotonic, or
isotonic.

You might also like