Download Worksheet Section 2

Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Worksheet Section 2-1(C)
WHAT IS DIFFUSION?
2. The movement of particles from areas of high concentration to areas of low
concentration is called ______________________.
3. The fluids that surround and fill a cell are made mostly of
______________________
4. Water is made up of particles called ______________________.
5. The diffusion of water through a semipermeable membrane is called
______________________.
MOVING SMALL PARTICLES
Match the correct description with the correct term. Write the letter in the space
provided.
_____ 10. particles moving across a cell
membrane without using energy
_____ 11. passageways in a cell membrane
_____ 12. the movement of particles from an
area of low concentration to an area
of high concentration across a cell
membrane
a. channels
b. active transport
c. passive transport
d. diffusion and osmosis
e. energy
_____ 13. two examples of passive transport
_____ 14. what a cell needs to transport particles
by active transport
15. The channels in a cell membrane are made up of ______________________.
MOVING LARGE PARTICLES
16. A large particle can enter a cell by an active-transport process called
______________________.
18. A large particle can leave a cell by an active-transport process called
______________________.
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The Cell in Action
Name ______________________________ Class ___________________ Date __________________
Use the figures below to answer questions 20 and 21.
20. In what order would the figures demonstrate exocytosis?
____________________________________________________________________
____________________________________________________________________
21. In what order would the figures demonstrate endocytosis?
____________________________________________________________________
____________________________________________________________________
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Holt Science and Technology
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The Cell in Action
Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Section 2-1(C) Review
Exchange with the Environment
USING KEY TERMS
For each pair of terms, explain how the meanings of the terms differ.
1. diffusion and osmosis
____________________________________________________________________
____________________________________________________________________
2. active transport and passive transport
____________________________________________________________________
____________________________________________________________________
3. endocytosis and exocytosis
____________________________________________________________________
____________________________________________________________________
UNDERSTANDING KEY IDEAS
_____ 4. The movement of particles from a less crowded area to a more crowded
area requires
a. sunlight.
c. a membrane.
b. energy.
d. osmosis.
5. What structures allow small particles to cross cell membranes?
____________________________________________________________________
____________________________________________________________________
MATH SKILLS
2
2
6. The area of particle 1 is 2.5 mm . The area of particle 2 is 0.5 mm . The area
of particle 1 is how many times as big as the area of particle 2? Show your
work below.
Skills Worksheet
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
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The Cell in Action
Name ______________________________ Class ___________________ Date __________________
Section 2-1 (C) Reinforcement
Into and Out of the Cell
Complete this worksheet after you finish reading the section “Exchange with the
Environment.”
Each of the boxes below represents a different method cells use to bring small
particles into the cell or to take small particles out of the cell. Add the letter for
each note at the bottom of the page to the appropriate box. Be careful—the notes
with * are used twice.
Small Particle Transport
Osmosis (3)
Passive Transport (4)
Active Transport (4)
Notes
A. particles move
through proteins*
B. sugar*
C. requires ATP
D. particles move
F. particles move
from an area of high
concentration to an
area of low
concentration*
E. does not require
ATP*
from an area of low
concentration to an
area of high
concentration
G. water
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
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The Cell in Action
Name ______________________________ Class ___________________ Date __________________
Assessment
Section 2-1 (C) Quiz
Section: Exchange with the Environment
Match the correct definition with the correct term. Write the letter in the space
provided.
_____ 1. the movement of water through a
membrane
_____ 2. the movement of substances through a
cell membrane without the use of cell
energy
a. diffusion
b. osmosis
c. active transport
d. exocytosis
_____ 3. the process by which a cell membrane
surrounds and encloses a large particle
to bring it into the cell
e. passive transport
_____ 4. the sac formed around a large particle
to allow a cell to take in or remove the
particle
g. endocytosis
f. vesicle
_____ 5. the movement of substances through a
cell membrane with the use of cell
energy
_____ 6. the movement of particles from regions
of higher density to regions of lower
density
_____ 7. the process by which a cell gets rid of
large particles
Write the letter of the correct answer in the space provided.
_____ 8. During the process of diffusion,
a. a cell surrounds and absorbs large particles.
b. particles move from areas of lower concentration to higher
concentration.
c. a cell surrounds and gets rid of large particles.
d. particles move from areas of higher concentration to lower
concentration.
_____ 9. Osmosis is important to cells because
a. cells are filled with fluids that are made mostly of water.
b. cells need to get rid of large particles they don’t need.
c. cells need to move from place to place.
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The Cell in Action
Name ______________________________ Class ___________________ Date __________________
d. cells are usually dry.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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The Cell in Action