What type of membrane is membrane X? semipermeable Why? Only water crosses What type of membrane is membrane Y? selectively permeable Why? Water and urea can cross, but CaCl2 does not Compartment B is HYPOSMOTIC crosses) HYPEROSMOTIC Compartment B is HYPOTONIC HYPERTONIC ISOTONIC At equilibrium compartment A will end up with a HIGHER ISOSMOTIC to A (before any water to A (as water starts to cross) LOWER SAME volume than/as B

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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The diagram below shows a tank system consisting of 3 compartments (A, B and C) and 2 membranes (X
and Y) set up to study osmolarity and tonicity. The membrane permeabilities are shown in the table.
Compartment A is filled with a solution of 300 mM Sucrose. Compartment B is filled with a solution of
100 mM CaCl, Compartment C has a solution of 300 mM Urea. The volumes in each compartment are
the same at the beginning of the experiment.
A
Membrane X
Membrane Y
P
0
NA
X
B
Po
0
0
Purs
0
100
11
11
11
II
II
II
11
11
11
II
II
II
Y
10000
10000
Transcribed Image Text:The diagram below shows a tank system consisting of 3 compartments (A, B and C) and 2 membranes (X and Y) set up to study osmolarity and tonicity. The membrane permeabilities are shown in the table. Compartment A is filled with a solution of 300 mM Sucrose. Compartment B is filled with a solution of 100 mM CaCl, Compartment C has a solution of 300 mM Urea. The volumes in each compartment are the same at the beginning of the experiment. A Membrane X Membrane Y P 0 NA X B Po 0 0 Purs 0 100 11 11 11 II II II 11 11 11 II II II Y 10000 10000
What type of membrane is membrane X? semipermeable
Why? Only water crosses
What type of membrane is membrane Y? selectively permeable
Why? Water and urea can cross, but Caciz does not
Compartment B is HYPOSMOTIC
crosses)
HYPEROSMOTIC
Compartment B is HYPOTONIC HYPERTONIC ISOTONIC
At equilibrium compartment A will end up with a HIGHER
ISOSMOTIC to A (before any water
to A (as water starts to cross)
LOWER
SAME volume than/as B
Transcribed Image Text:What type of membrane is membrane X? semipermeable Why? Only water crosses What type of membrane is membrane Y? selectively permeable Why? Water and urea can cross, but Caciz does not Compartment B is HYPOSMOTIC crosses) HYPEROSMOTIC Compartment B is HYPOTONIC HYPERTONIC ISOTONIC At equilibrium compartment A will end up with a HIGHER ISOSMOTIC to A (before any water to A (as water starts to cross) LOWER SAME volume than/as B
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