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Transcript
Ardrossan Academy Dead Earth Subtopic – Plant Cells 1 Ambition – Respect - Excellence Lesson Title: Plant Cells Learning Intention:. State the parts of a plant cell and their functions Activity: I will be successful if I can : Label a diagram of a plant cell 2 Ambition – Respect - Excellence • Rationale: • We will require plants/crops to survive on our new planet. • What structures are present in a plant cell and how do they contribute to its function? • What will conditions for photosynthesis be like? • Can we take agricultural chemicals with us? What will be their impact on our food supply? 3 Ambition – Respect - Excellence Looking at Cells • Cells are the ‘building blocks’ of life. 4 Ambition – Respect - Excellence • Cell Size and Scale • http://learn.genetics.utah.edu/c ontent/begin/cells/scale/ 5 Ambition – Respect - Excellence Nucleus vacuole cytoplasm Cell membrane Cell wall chloroplast 7 Ambition – Respect - Excellence Animal Cells Cell Membrane Cytoplasm Nucleus 8 Ambition – Respect - Excellence Plant cell structures Cell wall Cell membrane Cytoplasm vacuole Nucleus Chloroplast 9 Ambition – Respect - Excellence Summary Animal Cells Plant Cells nucleus nucleus cytoplasm cytoplasm cell membrane cell membrane cell wall vacuole chloroplasts 10 Ambition – Respect - Excellence Function of components 11 Ambition – Respect - Excellence The Nucleus • Controls the cell’s activities 12 Ambition – Respect - Excellence The Cytoplasm • It is a jelly like material •All the chemical reactions happen here cytoplasm 13 Ambition – Respect - Excellence The Cell Membrane •The cell membrane controls which substances may enter and leave the cell. • Oxygen and food move into the cell. • Carbon dioxide moves and other wastes move out of the cell. Cell membrane 14 Ambition – Respect - Excellence Plant Cells • Plants, as you know, don't have a skeleton to form a rigid framework and so they need some other means of structural support. 15 Ambition – Respect - Excellence The Cell Wall • This is an extra, strong, rigid structure on the outside of the membrane • It contains holes so it is permeable Gives the plant a definite shape + support 16 Ambition – Respect - Excellence The Vacuole • The vacuole contains cell sap ( a solution of sugars and salts). 17 Ambition – Respect - Excellence Chloroplasts •Trap light for photosynthesis. • Chloroplasts contain a green pigment called chlorophyll. 18 Ambition – Respect - Excellence Elodea Leaf Cell wall Vacuole Chloroplasts 19 Ambition – Respect - Excellence Cell membrane – controls the movement of substances into and out of the cell Cytoplasm – most chemical processes take place here, Nucleus – contains genetic controlled by material, which controls the enzymes activities of the cell 2. 1. Ambition – Respect - Excellence Vacuole – filled with cell sap to help keep cell turgid (enlarged and swollen Chloroplasts – with fluid) contain chlorophyll which absorbs lights energy for? Cell wall - strengthens 20the cell Part Nucleus Function Cell membrane Cytoplasm Filled with cell sap Gives plant cells a rigid shape Contains the green pigment chlorophyll that traps light for photosynthesis Plant /animals BOTH NOTE!! BOTH These BOTH are not in the correct Plant cells onlyorder Cell wall Controls all cell activities (the brain of the cell) Vacuole Controls what can enter Plant cells and leave the cell only Chloroplast Where all the chemical reactions take- Excellence place Ambition – Respect Plant cells 21 only Part Nucleus Function Plant /animals Controls all cell activities BOTH Cell membrane Cytoplasm Controls what can enter and leave the cell Where all the chemical reactions take place BOTH Cell wall Gives plant cells a rigid shape and support. Plant cells only Vacuole Filled with cell sap Plant cells only Chloroplast Contains the green pigment Plant cells chlorophyll that traps light 22 only for photosynthesis Ambition – Respect - Excellence BOTH We use dyes called stains in biology. • Why do we use Stains when preparing slides? • This is because some of the cells structures are not clear and can be shown more clearly when a stain has been added. Iodine: Stains the nuclei in plants and animal cells brown or blue-black. 23 Ambition – Respect - Excellence Experiment: Staining of Cells Now, over to you….. •Prepare and examine living tissue under the microscope 24 Ambition – Respect - Excellence Using a Microscope • Your teacher will show you how to correctly set up a microscope. • Prepare an onion cell 25 Ambition – Respect - Excellence Stain - Iodine solution 26 Ambition – Respect - Excellence 27 Ambition – Respect - Excellence