*Cells in Action

*Cell Transport

*Substance moves into cells (water, gases, food)

*Substances move out of cells (waste, excess water, gases)

*Cell membrane controls movement

*Semi-permeable

*Substances that allow some materials to flow through, but not other substances

*Cell membrane is semi-permeable

*Allows oxygen and water to pass through but not large proteins

*Passive Transport

*Movement of substances through the cell without use of energy

*Transport water, oxygen, gases

*Diffusion

*Movement from crowded area to less crowded

*Examples: ammonia, burnt toast, perfume, cookies

*Osmosis

*Diffusion of water through semi-permeable membrane

* Crowded to less crowded

*Example: Wilted plant will become firm again if given water

*Active Transport

*Endocytosis

*Cell uses energy to surround particle into vesicle

*Amoeba- capture food particles

*Exocytosis

*Vesicles form around particles and push towards cell membrane to release

*Multi-cellular

*Photosynthesis

*In plants

*Take sunlight and CO2 and water

* Convert to sugars and oxygen

*Happens in the chloroplasts

*Contain chlorophyll (green pigment)

*Sugar called glucose

*Formula:

6CO2 + 6H2O + energy C6H12O6 + 6O2

*Cellular Respiration

*Organisms that eat plants get the glucose that was stored in the plant

*Broken down sugar= ATP

*Breaking down food into ATP is cellular respiration

*How it happens

*Begins in cytoplasm

*Glucose broken down into 3-carbon molecules

*Oxygen enters cell and travels to mitochondria

*3-carbon molecules break down releasing energy that is taken by ATP

*CO2 , water, and ATP released

*C6H12O6 + 6O2 6CO2 + 6H2O + ATP

*Anaerobic vs. Aerobic

*Anaerobic- without oxygen

*Produces some ATP

*Use during hardcore exercise

*Produce lactic acid

*Fermentation is an example (bread)

*Aerobic- with oxygen

*Word SortWith your group- organize how these works can go together

*• photosynthesis

*• glucose broken down

*• light energy

*• energy released

*• respiration

*• chloroplast

*• glucose created

*• mitochondrion

*• energy stored

*• carbon dioxide