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Cellular Structure and Function
3 Cellular Transport
REVIEW
VOCABULARY
homeostasis
NEW VOCABULARY
Recall the definition of the Review Vocabulary term.
homeostasis
a self-regulating process by which biological systems
Write the correct New Vocabulary term in the left column for each
definition below.
net movement of particles from an area where there are many
particles of the substance to an area where there are fewer
condition in which there is continuous movement but no overall
change in concentration
form of transport that uses transport proteins to move other ions and
small molecules across the plasma membrane
diffusion of water across a selectively permeable membrane
solution in which the inside of the cell and the solution it is in have the
same concentration of water and solutes
solution that has a lower concentration of solutes than in the cell
solution that has a higher concentration of solutes than in the cell
using energy to move substances from a region of lower
concentration to a region of higher concentration
process by which the plasma membrane surrounds a substance
inside the cell and moves it outside the cell
Rephrase the process of diffusion in your own words, and give an
example.
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process by which the plasma membrane surrounds a substance
outside the cell and moves it inside the cell
3 Cellular Transport (continued)
Summarize the relationship between water and the plasma
membrane by completing the concept map below.
water flows
Water and
the Plasma
Membrane
Copyright © McGraw-Hill Education
osmosis is
flow through helps
and
homeostasis
homeostasis is
Get It?
Compare and contrast diffusion and osmosis.
Get It?
Compare and contrast the three types of solutions.
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89
3 Cellular Transport (continued)
Classify and summarize the five ways particles move through the
membrane. Make notes and sketches in the rectangle for each one.
simple diffusion
facilitated diffusion
active transport
exocytosis
endocytosis
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90
Copyright © McGraw-Hill Education
Get It? Compare and contrast active and passive transport across
the plasma membrane.
3 Cellular Transport (continued)
CHECK YOUR PROGRESS
1. List and describe the types of cellular transport.
2. Explain the role of the cell membrane during passive transport and active transport.
3. Sketch a before and an after diagram of an animal cell placed in a hypotonic
solution.
Copyright © McGraw-Hill Education
4. Contrast how facilitated diffusion is different from active transport.
5. Describe Some organisms that normally live in pond water contain water pumps.
These pumps continually pump water out of the cell. Describe a scenario that might
reverse the action of the pump.
6. Summarize the role of the phospholipid bilayer in cellular transport in living cells.
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