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Transcript
Cell
Membrane
How did it get
there?
Getting in
Gas
Exchange
Misc Cell
100
100
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300
300
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400
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400
400
400
500
500
500
500
500
Number of layers of the cell
membrane
Two
What are the layers of the cell
membrane made of?
Phosolipids and Proteins
The structures of the cell
membranethat act as antennae to
receive chemical messages
Glycoproteins and glycolipids
The nonpolar tails of
phospholipids tend to repel ?
and let ? Molecules pass
through.
Ions and fat soluble
Explain the structures of this
diagram…
Water moving from a high to low
concentration through a
selectively permeable membrane.
osmosis
What is diffusion?
Movement of molecules from a
high to low concentration.
What happens to the molecules
when a cell reaches equilibrium?
Concentrations are equal, but
movement still occurs.
What is facilitated diffusion?
Diffusion (high to low
concentrations) through protein
channels to allow large molecules
through.
Two ways that facilitated
diffusion and active transport are
different.
Low to high concentration, active
requires energy.
What are channels made of?
protein
What would happen if a cell was
impermeable?
die
An animal cell surrounded by
fresh water the turgor pressure
can increase to the point the the
cell will…..
burst
If a cell ‘s internal salt
concentration is 5% What would
happen to the cell if it was placed
in water with .02% salt solution
Water will diffusion into the cell.
If a cell were treated with a chemical
that inhibits active transport what
would happen to the cell?
Cell would die
Which has a high O2
Concentration water or air
air
The primary concern of land gas
exchange is..
Drying out of the surfaces
The structure in the lungs of
mammals that exchanges gases
with the capillaries____
aveoli
The total surface area of all the
alveoli in the average person’s
lungs?
2 meters
12 meters
60 meters
600 meters
60 meters
Describe the path that air takes
through the body.
Nose, nasal cavity, trachea,
pharynx, larynx, bronchus,
bronchioles, alveoli, capillaries,
blood through the body back to
lungs and out.
How do gases get in and out of
plant cells?
Stomates, surrounded by guard
cells open and close to allow
gases in and out.
Function of oils and waxes on
human skin
Prevent water loss
Plant water loss
Transpiration
What are three functions of the
nephrons?
Filtration, secretion and
reabsorption
Three types of nitrogen wastes
secreted by animals.
Ammonia-directly into water-fike
fish
Urea- diluted in water-Mammals
Uric Acid-non-soluble,
non toxic Birds and desert
reptiles