Salt

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Where is the water moving?

• The water is moving out of the cell.
• Why?
• Remember where ever salt is water follows!

Salt
SALT
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Where is the water moving?

• Water is moving out of the cell.
• Why?
• Because where ever salt is water follows.

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Light blue SaltDark blue water
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There is a lot of salt out side the cell what
will happen? Why?
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What will happen if there is a lot of salt inside
the cell?
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Red Onion Cells

• Normal

• In Salt Water
• What happened to the cytoplasm and cell membrane?

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Making The CellWhat is located inside the cell
in the beginning?

• Starch, Glucose, and Water.

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This is what the experiment looks like in the
beginning

• Water and Starch Indicator Solution are located
  on the outside of the cell.
• Starch and Glucose are located inside the cells.

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Whats happening after the 1st 10 minutes?

• The cell is starting to turn blue black
• Why?
• Because Starch Indicator solution is moving
  across the membrane.

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Is This The Final or Initial State?
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Label The Contents Of Your Cells

• Initial State

• Final State

H20, Glucose, Starch Indicator Solution
H20 and Starch Indicator Solution
Starch and Glucose
Glucose, Starch, and Starch Indicator Solution
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7) In the initial state diagram below, Starch
Indicator Solution is indicted by the letters
I. The letters S Stand for Starch and G for
Glucose.Indicate the areas where each of these
molecules are located in both diagrams.
I I I I I I
I G I G I G I G I G
I
S G S G S G S S G G S G G S S
G G S
S G I G I S S G I G I S G I S I S G I S
I S I S
I G I G I G I G I
I I I I I I I I I I I I
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Question 1

• During the lab, one group of students messed up.
  They poured the starch indicator solution into
  the cell and filled the beaker with starch and
  glucose solution. State what their results would
  look like.

• The outside of the cell would turn blue black
  instead of the inside of the cell.

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What Went Wrong?
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Question 2

• Plant cell in salt environment.
• The salt would damage or kill the plants. The
  salt environment would cause water to move out of
  the plant cell

• Normal plant cell

http//ccollege.hccs.edu/instru/Biology/Wagle/Plas
molysis.swf
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Question 3

• When a person is given an I.V., the fluid has a
  little salt in it just like our blood.
• Explain how the use of distilled water in place
  of saline solution would up set homeostasis.

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Question 3

• Homeostasis would be upset because their would be
  more salt inside a cell then outside a cell. The
  water would move into the cell causing it to
  burst.

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Question 4

• Fresh water fish have a contractile vacuole which
  pump out extra water. Explain why once celled
  organism in salt water would not need a
  contractile vacuole?
• Contractile vacuoles are of no value to salt
  water organisms because there is no excess water
  to be removed.

Salt Water
Fresh Water
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Question 5

• Why does eating popcorn make you thirsty?
• Popcorn is very salty and may cause water to
  leave the cells of your mouth and through due to
  diffusion. This makes a person thirsty.

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6) Why is the digestion of starch to glucose
necessary?

• Starch is big and must be broken down into
  glucose so it can diffuse across a cell
  membrane. Glucose is small enough to diffuse
  across a cell membrane.

Glucose
Starch (carbohydrate)
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Your homework Is to finish your lab! If it is
not done it will be a Zero. No excuses! The Mad
Scientist