Cell Transport Cell Transport Definition The movement of
- Slides: 33
Cell Transport
Cell Transport Definition: The movement of substances within a cell, and the movement of substances into and out Animal of a cell. Example: Cell: Into the Cell. C 6 H 12 O 6 + Out of Cell O 2 2 + H 2 O CO 2 Types: Passive Transport & Active Transport The Simple Difference: Active transport requires energy an passive transport does not
Passive Transport Definition: • When substances move into and out of a cell because of diffusion and osmosis. • Does not require energy (ATP) Random motion of 2 • Types: • molecules Diffusion leads to • dispersal Osmosis
Diffusion Definition: • A form of Passive Transport • When substances move from an area of higher concentration to an area of lower concentration. What is concentration?
Before After Low Concentratio n of Fart Molecules High Concentration Of Fart Molecules equally spread out throughout the classroom
Equilibrium Definition: When there is an equal concentration of substances spread throughout an area or container.
Active Transport Definition: • When a cell uses energy to move substances. • Moving substances from an area of low concentration to an area of high concentration Example: When a paramecium excretes water from its contractile vacuole
Osmosis Definition: • A form of Passive Transport • Diffusion in water: When different concentrations of dissolved substances in water (a solution) causes water to move from one area to another 3 Types of solutions : 1. Hypertonic 2. Hypotonic 3. Isotonic
1. Hypertonic Solution Before Water High conc. Inside the Low conc. Outside cell Overall Water the cell moves out of After Salt High conc. Outside Low conc. the - cellthe Inside Overall cell Salt moves into the
2. Hypotonic Solution Before After Sug ar Water High conc. Outside the Low conc. cell Inside the Overall Water cell moves into the Suga r Inside High conc. the Low conc. cell Outside the Overall cell Sugar moves out of
1. Hypertonic Solution Before Water High conc. Low conc. - After Salt High conc. Low conc. -
2. Hypotonic Solution Before After Sug ar Water High conc. Low conc. - Suga r High conc. Low conc. -
3. Isotonic Solution Same concentration of salt/sugar inside and outside the cell. Molecules continue to move, but overall stay in equilibrium.
Key Points for Osmosis…. What Moves? 1. Water 2. The substance dissolved in water which can be sugar, salt, urine etc… What • Water typically moves to the Happens? dissolved substance. Example… put salt on an eggplant and water will move out of the eggplant to the salt.
Osmosis in Animal Cells Details: Animal cells have a flexible membrane which can expand contract.
Osmosis in Animal Cells i n to o p Hy c ic Hy pe rto n
Osmosis in Animal Cells Hypotonic Cytolysis: The expansion of a cell due to a hypotonic solution. In some cases Hypertonic Crenation The shrinking of a cell due to a hypertonic solution.
This is a freshwater gold fish. What issues will it experience in saltwater and pure water?
Osmosis in Plant Cells Details: Different than animal cells because of a rigid outer wall known as the cell wall. The support of the cell wall prevents the plant cell from major changes in shape and size.
Osmosis in Plant Cells i n o t po Hy c ic Hy pe rto n
Osmosis in Plant Cells Hypotonic Turgor Pressure The expansion of the cell membrane causes the cell wall to bend Hypertonic Plasmolysis: The shrinking of the cell membrane causes the cell wall
What happened to the plant cell? Describe why this happened to the plant cell. Did anything leave or go into the cell? Explain
Types of Liquids Pure Water Salt Solution • Water with no salt or other dissolved substances (100% water) • Also known as distilled water • A solution of water and salt with a high concentration of salt. (80% water, 20% salt)
Types of Liquids Cell Solution 94% water 2% sugar 2% wastes 2% salt • A solution of water and dissolved substances found in a “typical cell. Typically, cells have a small amount of dissolved salt, sugar, wastes, etc. . • 94% water, 6% salt, sugar, and wastes
Background information for lab experiments: v Molasses is a simple sugar (small molecule) v Iodine is an indicator for starch § Iodine which is yellow/orange turns starch black v Starch is a large molecule, made up of many small sugars Answer the conclusion questions in full v Potatoes are made of cells (duh) sentences. If there is a key term (ex. hypotonic, equilibrium, etc. . . ) circle the key
Lab A: Starch and Iodine
Lab B: Molasses and Water
Lab C: Potato in Distilled Water Potato in Saltwater
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