cell biology chapter eight: cell processes 8.1 the cell membrane 8.2 cells and energy
TRANSCRIPT
![Page 1: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/1.jpg)
![Page 2: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/2.jpg)
Cell Biology
![Page 3: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/3.jpg)
Chapter Eight: Cell Processes
• 8.1 The Cell Membrane
• 8.2 Cells and Energy
![Page 4: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/4.jpg)
Investigation 8B
• Does the color of light affect photosynthesis?
Photosynthesis and Color
![Page 5: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/5.jpg)
8.2 What is photosynthesis?
• Photosynthesis is a chemical reaction that takes place in the chloroplasts of plant cells.
• During photosynthesis, plants use the energy of sunlight to produce energy-rich molecules called carbohydrates (ex. glucose).
In photosynthesis, plants take in carbon dioxide and water and release glucose and oxygen wastes.
![Page 6: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/6.jpg)
8.2 What is photosynthesis?
• Chloroplasts are where photosynthesis occurs.
• Chloroplasts work much like solar cells found in calculators.
![Page 7: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/7.jpg)
8.2 Light and color
• The Sun provides Earth with a steady source of light.
• Your eyes see sunlight as white light, but it is really made up of different colors of light.
A clear prism can split white light into a rainbow of color.
![Page 8: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/8.jpg)
8.2 Light and color• Light is part of a collection of waves known as
the electromagnetic spectrum.• Waves can be described by their wavelength
(length from peak to peak), and their energy.
![Page 9: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/9.jpg)
![Page 10: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/10.jpg)
8.2 Light and color
• Color is how we experience the energy of light.
![Page 11: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/11.jpg)
8.2 Chlorophyll
• A pigment is a molecule that absorbs some colors of light and reflects others.
• Chlorophyll is the main pigment used in photosynthesis.
![Page 12: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/12.jpg)
8.2 Chlorophyll
• Chlorophyll absorbs mostly blue and red light, and reflects green light.
• This is why most plants look green.
![Page 13: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/13.jpg)
8.2 Cellular respiration
• Cellular respiration is a chemical reaction that occurs in all living things.
• Cells use oxygen and glucose to produce carbon dioxide, water, and energy.
![Page 14: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/14.jpg)
8.2 Cellular respiration
• In most eukaryotic organisms, cellular respiration takes place in the mitochondria of cells.
• During cellular respiration, energy is stored in a molecule called ATP while some energy is released as heat.
![Page 15: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/15.jpg)
8.2 Comparing photosynthesis and respiration
• The chemical equations of photosynthesis and respiration have an interesting relationship.
• The reactants in photosynthesis are the products in cellular respiration!
• The reactants in cellular respiration are the products in photosynthesis!
![Page 16: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/16.jpg)
![Page 17: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/17.jpg)
Research Connection
• So how do stem cells change into other types of cells?
• Scientists are studying this problem.
Amazing Cells
![Page 18: Cell Biology Chapter Eight: Cell Processes 8.1 The Cell Membrane 8.2 Cells and Energy](https://reader035.vdocuments.mx/reader035/viewer/2022062409/56649ca45503460f9496516f/html5/thumbnails/18.jpg)
Activity
• A concept map is a way to represent information visually.
• Create a concept map to explain how cells get and use energy.
Making a Concept Map