Plasmolysis Flashcards
The behaviour of the plant cells (or tissues) with
regard to water movement depends …
on the
surrounding solution.
Isotonic solution?
If the external solution
balances the osmotic pressure of the cytoplasm,
it is said to be isotonic.
Hypotonic and hypertonic
the external solution
is more dilute than the cytoplasm, it is
hypotonic and if the external solution is more
concentrated, it is hypertonic.
Cells swell in ? and shrink in ?
ones.
hypotonic solutions
hypertonic solutions
Plasmolysis occurs when …
water moves out of
the cell and the cell membrane of a plant cell
shrinks away from its cell wall.
This occurs when cell (or tissue) is placed in a solution that is ….
hypertonic (has more solutes)
to the protoplasm.
Water moves out; it is first lost from the … and
then from the …
cytoplasm
vacuole
The water when drawn out of the cell through diffusion into the extracellular (outside cell) fluid causes ….The cell is said to be …
the protoplast to
shrink away from the walls.
plasmolysed
The movement of water occurred across the membrane moving from an area of …
high water potential (i.e., the cell) to an area of lower water potential outside the cell.
When the cell (or tissue) is placed in an isotonic solution, ….
there is no
net flow of water towards the inside or outside.
isotonic?
If the external solution
balances the osmotic pressure of the cytoplasm it is said to be
flaccid.
When water flows into the cell and out of the cell and are in equilibrium,
the cells are said to be
The process of plamolysis is usually …
reversible.
turgor pressure.
When the cells are
placed in a hypotonic solution (higher water potential or dilute solution
as compared to the cytoplasm), water diffuses into the cell causing the
cytoplasm to build up a pressure against the wall, that is called
pressure potential Ψp.
.
The pressure exerted by the protoplasts due to entry of water
against the rigid walls is called
