Download On-line-learning-lab-2

Agenda
• 1-Turn in cell lab packet
• 2. Make up labs will be Weds. a.m. at 8:30
• 3-Turn in cell project
– Rubric and analogy worksheet MUSt be
stapled to the upper LEFT hand corner. Your
name must be on all pages.
4. Test is Dec. 17.
5. Diffusion on-line learning
Diffusion and Osmosis On-line
learning
1.
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Watch the Brain Pop videos on
diffusion/osmosis:
Diffusion
Active Transport
Passive Transport
Gills Breathe Under Water (you will need
to type Gills into the search box on Brain
Pop)
Diffusion and Osmosis On-line learning
• Go to your online text
– Go to the eActivities tab
– Ch. 4
– Take 2 column notes on:
• Section 1: Exchange with the Environment
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Diffusion in a Liquid
Osmosis
Osmosis
Cell Environments and Osmosis
Active Transport
Comparing Active and Passive Transport
Endocytosis
Exocytosis
Diffusion/osmosis
TERMS HERE:
Diffusion in a Liquid
Osmosis
Osmosis
Cell Environments and
Osmosis
Active Transport
Comparing Active and
Passive Transport
Endocytosis
• Notes HERE
Diffusion and Osmosis On-line learning
• Go to the Lab Bench Activity and complete the
Diffusion lab. You will need to click through the
following links on the right hand side of the web
page:
Introduction
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Key Concepts
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Concept 1: Diffusion
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Concept 2: Osmosis
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Closer Look: Osmosis
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Concept 3: Movement of Molecules
in Solution
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Closer Look: Concentration
Gradient
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Concept 4: Movement of Molecules
and Cells
• 3RD AND 5TH PERIODS: Go to the last
slide and work on the cell organelle game
• 4TH AND 6TH PERIODS:
• Continue with the remainder of the
PowerPoint.
Diffusion and Osmosis On-line learning
• AC classes define the following terms in your 2column notes using the information on the
following slides:
• Solution
• Solvent
• Solute
• Isotonic
• Hypertonic
• hypotonic
Definitions for AC
• Solution – A uniform mixture of 2
substances
• Solute – The dissolved substance
in a solution
• Solvent – The dissolving
substance in a solution
Type of Solutions
ISOTONIC
• If the concentration of solute (salt) is
equal on both sides, 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 same
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HYPOTONIC
The word "HYPO" means less, in this case there are
less solute (salt) molecules outside the cell, since salt
sucks or absorbs, water will move into the cell.
The cell will gain water and grow larger. 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 bursting,
organelles called
CONTRACTILE
VACUOLES will pump
water out of the cell to prevent this.
HYPERTONIC
• The word "HYPER" means more, in this
case there are more solute (salt)
molecules outside the cell, which causes
the water to be sucked in that direction.
• In plant cells, the central vacuole loses
water and the cells shrink, causing wilting.
• In animal cells, the cells also shrink.
• In both cases, the cell may die.
HYPERTONIC
• This is why it is dangerous to drink sea
water - its a myth that drinking sea water
will cause you to go insane, but people
marooned at sea will speed up
dehydration (and death) by drinking sea
water.
• This is also why "salting fields" was a
common tactic during war, it would kill the
crops in the field, thus causing food
shortages.
HYPERTONIC
• Diffusion and Osmosis are both types of
PASSIVE TRANSPORT - that is, no
energy is required for the molecules to
move into or out of the cell.
• Sometimes, large molecules cannot cross
the plasma membrane, and are "helped"
across by carrier proteins - this process
is called facilitated diffusion
AC Classes
• Complete the following lab:
Under what conditions do cells lose or gain
water?
• Go down to the table and chart at the end
of the left hand column. Copy the chart
into your notebook.
• Virtual Lab
Cell Review
Go to Nobel Prize Games for
Cell Organelle Game