Biology Questions and Answers
concentration to a region of lower solute
concentration.
One can consider osmosis as movement
of water movement of solutes, b(solvent) and diffusion asoth
concentration gradient-driven.
- What is osmotic pressure?
Osmotic pressure created in an aqueous solution bis the pressurey a (^)
region of lower solute concentration
upon a region of higher solutconcentration forcing the passage e (^) of
water from that to this more
concentrated the osmotic pressure region. The intensity of(in units of
pressure) is equal to the pressure that
is necessaryprevent its dilution to apply in the solby the entering ofution to
water by osmosis.
It is possible another pressure to apply in the solutionin the contrary way (^) to
the osmotichydrostatic pressure of the liquid or the pressure, like the (^)
atmospexample, heric pthe rigid cell wallressure. In plant cells, makes for
opposite pressure against the tendency
of water under a hypotonic ento enter when the cell is puvironment. t
Microscopically, the pressure contrary to
the osmoticwater to pass thro pressure ugh a semipermdoes not forbideable (^)
membrane but it creates a
compensatoryopposite way. flux of water in the
- Can solutions with the same
concentration of different
solutes have different osmotic
pressures?
The osmoticnot depend on the nature of the solut pressure of a solution doese,
it depends only molecules (particles)on the quantity of in relation to the (^)
total solution volume. Solutions with
same concentrationcontaining different solutes e of particlesxert th evene (^)
same osmotic pressure.
Even when the solution contains amixture of different solutes its osmotic (^)
pressure depends only particle concentration regardless of theon its total (^)
nature of the solutes.
- How are solutions classified
according to their comparative
tonicity?
Comparative to another, a solution can
be hypotonic (or hyposmotic),(or isosmotic) or hypertonic (or isotonic
hyperosmotic).
When a solthan another the adjective hypotonic isution is less concentrated (^)
given and the more concecalled hypertonic. When two comparentrated is (^) d
solutions have the same concentration
both receive this classificatthe adjective isotonic.ion makes sense only for So (^)
comparison of solutions.
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