Transcript Extra Membrane Ideas P.P - SchoolWorld an Edline Solution

Extra Membrane Ideas
I. Osmosis
• *** Selectively Permeable*** - membranes that only allow
______________ things through. For example, a membrane might allow
little things like _______________ to ___________ through it but not
have holes that allow larger things like ___________ or
________________ to pass through.
• Selectively permeable membranes make it so that particles like salt
_________ diffuse from a _________________ to a __________________
salt concentration. So, how can balance in concentration be created?
*** _______________*** - the______________ of ______________ from a
_________________ water concentration to a _________________ water
concentration through a __________________ __________________
membrane.
Water will move in the direction where there is a ________ concentration of
salt (and hence a _______ concentration of water).
II. Osmosis and the Cell
Membrane
The cell ___________________ is selectively
_______________, water moves freely across
the cell's membrane, by diffusion.
A simple rule to remember is:
Salt Sucks
Salt - When it is concentrated inside or outside
the cell, it will draw the water in its direction.
This is also why you get thirsty after eating
something salty.
______________________ Solution
- When the concentration of solute (salt) is
_______ ___________ on both sides of the
cell membrane, the water will move back in
forth but it won't have any result on the
overall amount of water on either side.
"ISO" means the ____________
______________________ Solution
- There are _________solute (salt) molecules outside the cell. That
means that there is _______ water ___________ the cell and it will
diffuse _____________ (osmosis).
(Since “salt sucks,” water will move _______ the cell.)
The cell will __________ water and grow _________. In plant cells, the
central vacuoles will fill and the plant becomes stiff and rigid, the
cell wall keeps the plant from bursting.
In animal cells, the cell may be in danger of_____________.
"HYPO" means _______
______________________ Solution
- There are ________ solute (salt) molecules outside the cell. That
means that there is ________ water __________ the cell and it
will diffuse _____________ (osmosis).
(Since “salt sucks,” water will move __________ ____ the
cell.)
In plant cells, the central vacuole loses water and the cells shrink,
causing ___________ . In animal cells, the cells also
___________. In both cases, the cell may _______.
"HYPER" means ___________
• How could we revive
the lettuce?
• Why is salt used for
curing meat?
• What must be
considered when
giving injections to
patients at hospital?
Which word applies to each:
hypertonic, hypotonic, or isotonic?
Which word applies to each:
hypertonic, hypotonic, or isotonic?
III. Moving Massive Pieces of Food and Other
Material (chunks) Through Membrane
(for globs that are way too big… even for protein channels)
_____________ :
______________:
http://www.yellowtang.org/animations/endoc
ytosis_exocytosis.swf
__________________:
_________________:
Good pics of exocytosis