B.1D Cellular Transport and Homeostasis
I. Vocabulary Matching
Match the term in the box to the correct definition.
1.
2.
3.
4.
5.
A. Active transport
E A type of barrier that allows specific
things to pass through
D
The movement of a solvent, such as
water, from an area of low solute concentration to
an area of high solute concentration
C
Movement of molecules down a
concentration gradient without using energy
B A substance that dissolves in another
substance
_A
Movement of molecules against the
concentration gradient using energy
B. Exocytosis
C. Passive transport
D. Osmosis
E. Semi-permeable
II. Identification
Use the clues provided to fill in the blanks.
Word Bank
membrane
isotonic
homeostasis
into
hypotonic
out
hypertonic
equal
higher
solute
controlling
1.
A cell that is in a(n) _hypotonic_ environment has a _solute
the outside of the cell. Water moves _into the cell.
2.
A cell that is in a(n) hypertonic environment has a solute concentration that is _higher
the outside of the cell. Water moves out of the cell.
3.
A cell that is in a(n) _isotonic environment has _equal solute concentration both inside and
outside of the cell. The cell has reached homeostasis_.
4.
The cell _membrane
is responsible for
controlling
concentration that is lower on
on
what enters and leaves the cell.
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B.1D Cellular Transport and Homeostasis
III. Open-Ended Response
Answer the questions below. Use additional paper if needed.
1. Illustrate the differences between passive and active transport.
Students answers will vary but should resemble those below.
2.
The weather calls for icy roads, so the city scatters salt on the road. Explain how this may
affect plants that are next to the road.
When plant cells are exposed to a salty environment, the water inside the cells will
leave to the environment to try to reach homeostasis. Since water is leaving the
cells, the cells will shrink, and the plant will start to shrivel.
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