- Slides: 36
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 moves into and out of a cell without the use of energy Requires (ATP) : • Random motion of molecules leads to dispersal 2 Types: • Diffusion • Osmosis
Diffusion Definition: • When substances move from an area of higher concentration to an area of lower concentration. What is concentration?
Equilibrium Definition: When there is an equal concentration of substances spread throughout an area or container.
Before After Low Concentratio n of Fart Molecules High Concentration Of Fart Molecules equally spread out throughout the classroom
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
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.
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 Water High conc. Outside the Low conc. cell Inside the Overall Water cell moves into the After Suga r Inside High conc. the Low conc. cell Outside the Overall cell Sugar moves out of
3. Isotonic Solution Same concentration of salt/sugar inside and outside the cell. Molecules continue to move, but overall stay in equilibrium.
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 Hypertonic Turgor Pressure Plasmolysis: The expansion of the cell membrane causes the cell wall to bend outward. Helps to keep a plant The shrinking of the cell membrane causes the cell wall to bend inward. When a plant
Faciliated Diffusion Definition: • Large molecules cannot flow through the cell membrane • Transport proteins
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
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
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)
What will happen in the following situation?
How are the two diagrams different How are the two diagrams the same?
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
Low to High Cell Transport High to Low Passive Active In Air In Water Osmosis High Conc of water in the cell Hypertonic Diffusion Same Conc Inside and outside High Conc of water outside the cell Hypotonic Isotonic In an Animal Crenation In a Plant In an Animal Plasmolysis Cytolysis In a Plant Turgor Pressure
High to Low to High Movement of other molecules Movement of Water High Conc of water in the cell Same Conc Inside and outside In an Animal In a Plant High Conc of water outside the cell In an Animal In a Plant
Photosynthesi s �Creates glucose (sugar) �Uses the sun as the energy source Sun+ 6 CO 2+ 6 H 2 O Energy Enters source through the stomata roots 6 O + C 6 H 12 O 6 2 Oxygen Used in released respiration through the stomata • Some sugar is turned into starch for long term storage
Respiration 6 O + C 6 H 12 O 6 Enters 2 Enters through your respiratory digestive system �Release of chemical energy �Occurs in each and every cell of your body ATP + 6 CO 2+ 6 H 2 O Energy Leaves throug h your lungs Some reused, some leave through your excretory system. • Breathing brings in oxygen • Eating brings in sugar • Energy is released for the body to use • Carbon Dioxide and Water are released
2 types of Respiration �Aerobic Respiration: �Oxygen is used in this type of respiration �More efficient and more energy is released �Anaerobic Respiration: �Respiration without oxygen �Less efficient and less energy �Fermentation: �Yeast break down sugar in bread to release carbon dioxide �Lactic Acid Production: �Occurs in your muscles when they cannot get enough oxygen.