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Brain PopBrain Pop
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Tasha finally got the chance to go on Tasha finally got the chance to go on her favorite Norwegian Cruise ship. her favorite Norwegian Cruise ship.
However, one day into the cruise, the However, one day into the cruise, the ships meets a storm and leaves every ships meets a storm and leaves every
passenger stranded on an island. If passenger stranded on an island. If Tasha and her family are not rescued Tasha and her family are not rescued
and only have salt water to drink, and only have salt water to drink, explain why they would all die/perish.explain why they would all die/perish.
Solvent –vs- Solute
Solvent substance with
dissolving capability, thus can dissolve another substance. Solvents can be in a liquid, gaseous or solid state.
Solute substance that
dissolves in a solvent in order to form a solution. Solutes can be in liquid, gaseous or solid phase
Solvent + Solute=…Solvent + Solute=…
Solution..Solution.. homogeneous mixture of two or more
substances. It is called a homogenous mixture.. Same
throughout No separation
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Plasma MembranePlasma Membrane
Is a Is a selectively selectively permeable lipid permeable lipid bilayerbilayer found in all found in all cells.cells.
Able to regulate what Able to regulate what enters and exits the enters and exits the cell, thus transportcell, thus transporting ing materials for a cell’s materials for a cell’s survival. survival.
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What is the makeup?What is the makeup?
The cell membrane consists primarily of a The cell membrane consists primarily of a thin layer of thin layer of bilipid cellsbilipid cells
Arrange so that the Arrange so that the hydrophobichydrophobic (water (water hating) "tail" regions are shielded from the hating) "tail" regions are shielded from the surrounding polar fluid surrounding polar fluid
HydrophilicHydrophilic (water loving) "head" regions (water loving) "head" regions faces the extracellular polar fluidsfaces the extracellular polar fluids
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HomeostasisHomeostasis
Defined as the ability to maintain stable Defined as the ability to maintain stable internal conditions in spite of the internal conditions in spite of the changing external conditions.changing external conditions.
Diffusion:Diffusion: Movement of a substance Movement of a substance from a higher concentration to a lowerfrom a higher concentration to a lower
OsmosisOsmosis Ability of a fluid to pass through a Ability of a fluid to pass through a
semipermeable membrane from an area of semipermeable membrane from an area of higher concentration to lowerhigher concentration to lower
3 Types of Osmotic solutions…3 Types of Osmotic solutions…
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1. Hypotonic
Cell will experience a net gain of waterThis solution contains a lower concentration of solutes than the cell and therefore a higher concentration of waterConsequently, water will flow into the cell
2. Hypertonic
Cell will experience a net loss of water Contains a higher concentration of
solutes than the cell, therefore a lower concentration of water.
Consequently, water will flow out of the cell.
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3. Isotonic
Cell will experience neither a net gain nor loss of water.
This type of solution contains an equal concentration of solutes as the cell and therefore an equal concentration of water.
Consequently, water will flow equally into and out of the cell.
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3 Types of Osmotic Solutions
Discussion…Discussion… Tyrone wanted to make sure he drank Tyrone wanted to make sure he drank
enough water before he started school. enough water before he started school. He drank 5 liters of water and headed He drank 5 liters of water and headed out. Standing up, he felt dizzy and out. Standing up, he felt dizzy and passed out. passed out.
He later died…. Why?He later died…. Why?
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