1 / 25

Cell Unit Day 1

Cell Unit Day 1. SQ3R Survey, Question, Read, Recite, Review. First we will Survey the chapter. Read each heading, Look at pictures and diagrams, Read the Summary at the end. Read the Section Review Questions on page 67. Copy the E.Q’s into your notes.

jeroen
Download Presentation

Cell Unit Day 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cell UnitDay 1

  2. SQ3RSurvey, Question, Read, Recite, Review First we will Survey the chapter. Read each heading, Look at pictures and diagrams, Read the Summary at the end. Read the Section Review Questions on page 67. Copy the E.Q’s into your notes. Open your journal and Label: Cells Section 1 Answer: Explain what this section is about. Give examples from your surveyof the text.

  3. Day 1 E.Q. • Explain the cell theory. • Explain why cells are so small.

  4. Most cells are so small they cannot be seen by the naked eye. So how did scientists find cells? By accident!!! The first person to see cells was not even looking for them.

  5. What is a cell? Who Discovered Cells? A cell is the smallest unit that can perform all the processes necessary for life. Discovered by ???????? Robert Hooke How? Looking at a piece of cork in a microscope he built. Cell means “little rooms” What did he see?

  6. What Types of things did he Look At? Hooke looked at and compared living plants, feathers, fish scales and eyes of houseflies. OBSERVATIONS: plants had cell walls and animals did not. (he didn’t call them walls) What was his CONCLUSION? He thought that animals weren’t made of cells.

  7. Now View This Video ..\Videos\Robert Hooke and Cells.asf

  8. NOW DEFINE CELL Use one of your index cards to define CELL The smallest functional and structural unit of all living organisms. Keep in your notebook.

  9. THE CELL THEORY All organisms are made of one or more cells. The cell is the basic unit of all living things All cells come from existing cells.

  10. Who Wrote the First Two parts of Cell Theory? Theodor Swann THIRD PART OF CELL THEORY. Rudolf Virchow

  11. Who are the scientists who contributed to the discovery of cells? Robert Hooke (1665) discovers cells after observing a thin piece of cork under a microscope. Anton Van Leeuwenhoek (1673) made his own microscope (father of microscopes). Robert Brown (1831) discovers the nucleus in a plant cell.

  12. Matthias Schleiden (1838) discovers that all plant tissue is made up of cells. Theordor Schwann (1839) shows that all animal tissue is made up of cells. Rudolf Virchow (1858) determines that all cells are produced from cells. DuJardin saw the splitting of cytoplasm. Anton Schneider (1873) observes and accurately describes mitosis (cell division).

  13. Cell Size Cell SizeMost cells are too small to be seen without a microscope. It would take 50 human cells to cover the dot on this letter i. Some cells are big. The yolk of a chicken egg is one big cell. It can be this big because it doesn’t have to take in more nutrients.

  14. Why are most cells small? Cells take in food and get rid of wastes through their outer surface. As a cell gets larger, it needs more food and produces more waste and causes more materials to pass through the outer surface. (like us) As the volume increases, the surface area grows also. (just like us) But what’s inside grows faster than the surface can keep up. The cell’s volume grows faster than it’s surface area.

  15. If a cell’s volume gets too large, the cell’s surface area will not be able to take in enough nutrients or get rid of waste fast enough to keep the cell alive!!!

  16. The area of the cell’s surface compared with the cell’s volume limits its cell size. This ratio is called: Surface area –to-volume ratio.

  17. E.Q.Day 2 • Describe how bacteria are different from archaea. • Explain the difference between prokaryotic and eukaryotic cells. • Describe the structure of these cell parts and their function; cell membrane, cytoplasm, organelles, nucleus.

  18. Parts of a cell: Cell membrane What does the cell membrane do? Protects the cells surface and acts as a barrier; controls what goes in and out. Cytoplasm-fluid inside cell and all the organelles that it surrounds.

  19. Organelles tiny parts in the cell that perform specific functions within the cell (cytoskeleton, nucleus, ribosomes, endoplasmic reticulum/ER, mitochodria, chloroplast, golgi complex/golgi body, lysosomes, and vacuoles) Nucleus- contains DNA which is genetic material for making new cells and organisms. All cells at some point have DNA.

  20. Two kinds of a cell: • Prokaryotic Cells (Prokaryotes) (no nucleus) • Eubacteria • Archaebacteria • Eukaryotic Cells (Eukaryotes) (with a nucleus) • Animals • Plants • Some protists such as Amoebas • Fungi

  21. Type of Prokaryotes

  22. Eukaryotic Cells

  23. E.Q.Review. What are the parts of a cell? What differences are there in the two types of cells?

  24. Day 3EQ REVIEW Who first discovered cells? How did the discovery happen? Explain the parts of the cell theory. Why are cells so small? What are the parts of a cell? What differences are there in the two types of cells? Explain why organisms need food, water, air and living space. Describe the chemical building blocks of cells. Explain the 6 characteristics of living things.

  25. Day 4 Cells Warm-UP What is one difference in a prokaryote and a eukaryote?

More Related