LabModule 4 Osmosis
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Clark College *
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Course
160
Subject
Biology
Date
Dec 6, 2023
Type
docx
Pages
8
Uploaded by brynnalizzy
Activity
4
Effects
of
Hypotonic
and
Hypertonic
Solutions
on
Plant
cells
In
this
exercise,
you
will
observe
what
happens
to
plant
cells
(elodea)
when
placed
in
solutions
of
varying
tonicity.
Hypothesis:
Tonicity
of
a
solution
affects
the
water
content
and
structure
of
plant
cells.
Predictions:
PLANT
CELL
in
hypertonic
solution
—
Ceus
will
ghaink
PLANT
CELL
in
hypotonic
solution
—
cels
wilh
%m,u
¥
(Uptuce
Observation:
Watch
the
video
https://youtu.be/zVvHn6S
9PQ
to
make
observations
and
sketch
the
cells.
S
AL
NEIY
Results:
PLANT
CELL
in
hypertonic
solution
(20%
sucrose
0:00-0:23)
—
cells
Bhunk
PLANT
CELL
in
hypotonic
solution
(water
0:24-0:38)
another
good
video
of
hypotonic
is
(https://youtu.be/pFsty-XyLZc)-
conon)
cevs
%(w)
Activity
3
Effects
of
Hypotonic
and
Hypertonic
Solutions
on
Red
Blood
Cells
In
this
exercise,
you
will
observe
what
happens
to
red
blood
cells
(RBC)
when
placed
in
solutions
of
varying
tonicity.
Blood
cells
are
very
small
cells,
so
examples
use
oil
immersion
lens
to
observe
the
effects
of
these
solutions
Hypothesis:
Tonicity
of
a
solution
affects
the
water
content
and
structure
of
red
blood
cells
Predictions
RBC
in
isotonic
solution—
C€1|
{}Jv\\
emain
‘,‘I\C}\On’.l‘fij
RBC
in
hypertonic
solution
=
CE||
(11|
"/‘n“flK
RBC
in
hypotonic
solution
-
C
€|
i\l
Q
oW
Observation:
Watch
this
video
of
https://www.youtube
com/watch?v=A8cl6FkcG4c.
Pause
the
video
at
1
51,
242
and
3:18
to
make
observations
and
sketch
the
cells
Results
RBC
in
isotonic
solution
(lj
in
0.9%
NaCl
@
1500x)
-
CE\S
cemain
¥E
Some
(unchanged
)
Qe
O
ZRO
o
RBC
in
hypertonic
solution
(2:42
in
10%
NaCl
@1500x)
—
Ceus
shrink
5
(BWelLT
tucst)
%;’;%%
RBC
in
hypotonic
solution
(3:18
in
water
@1500x)
—
A
AR
Y
LG\\D‘fuT)hAVQ
Results
|
Treatment
-
Ul)%fh’dll()’l}‘,
|
Potato
strip
in
Tap
)OO0
S0P
Was
laroec
Water
Potato
strip
in
salt
|
.
DMANEC
+
D04
Water
|
Y
|
Control
Pma?o
strE'T
Table
2:
weight
of
potato
strips
before
and
aofter
treatment
with
different
tonicity
liquids.
1’
;Etment
|
In’mra—lamght
of
Potato
!
Welgfi;
of
Potato
Strip
|
Difference
nnVVéJght
(use
|
|
Strip
(g)
J
after
1
hour
(g)
|
+gor-g)
Tap
Water
[\
30
nor
own
o
tod
|
R
|
e
SCal€=|
SaltWater
|
|
—
—
.‘
—_—
Afi
—
el
—
el
Conclusions:
Briefly
explain
your
results.
Be
sure
to
correctly
use
the
following
terms:
Hyperosmotic,
Hypo-osmostic,
Hypotonic,
Hypertonic,
Osmosis,
Diffusion,
Concentration
gradient
and
selectively
permeable
nv\;\rfnt?/rane
-“he
Nmmplgfrt]
Wwo
+he
+UP
(,()[,[ft‘(‘(
\\L,\‘OTOTMC
Solu
hOn\
ecame
'()ni)fi()&r
¥
hardéned
because
1+s
warer
Concepy,
o
N
NCréeasey
(d.wug.orifiw{«
watee
hasa
higher
Concentration
grachent;
which
cauges
i+
k)(jo
Through
+he
Sekective
pecmeable
vemprane
nto
Jhe
porato.
The
QONOY0
Dlocey
WO
+he
Sai-
wo»er(mp@rtomc
Soluton)
SUnK
9ot
SoRtec
bbacause
¥
Water
Conentration
ci“"““f
S.Lnbs:sB
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Related Questions
Question 8
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Suppose two living plant cells are in contact with each other so that water, but not solutes, can pass between them. The cells have
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Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
P = 0.5 MPa
a
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P = 0.1 MPa
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Question 8
Homework • Unanswered
Suppose two living plant cells are in contact with each other so that water, but not solutes, can pass between them. The cells have
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the second cell?
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a
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P = 0.1 MPa
P = 0.8 MPa
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What is the uP of a living plant cell that has ų = -0.2 MPa and uS =-0.4 MPa?
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+
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QUESTION 1
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and
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← AP_5069_L04_DiffusionAndOsmosis.docx
bluehost
Sell where your
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PAGE 1/10
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ON 5G
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Solution
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Tonicity of the Solution
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