sci

• Cell


  The basic unit of life
• Cell theory


  A fundamental concept in biology that describes the major characteristic of life
• Robert Hooke observed cork under a microscope and coined the term "cell"
• Anton van Leeuwenhoek was the first to observe living organisms under a microscope and called them "animalcules"
• Matthias Schleiden


  • Fascinated with plant cells, used the microscope to study them and determined that plant parts are made of cells
• Theodor Schwann


  • Studied plant and animal cells, determined that all animals are made of cells, published the first statement of the cell theory
• Rudolf Virchow


  • Stated that all cells come from pre-existing cells, which is the second part of the cell theory
• Key components of cell theory

  • All organisms are composed of one or more cells
  • Cells are the smallest and basic units of structure and function in organisms
  • Cells arise from previously existing cells
• Development of cell theory

  1. Hooke observed cork

  2. Leeuwenhoek observed animalcules

  3. Schleiden studied plant cells

  4. Schwann studied plant and animal cells

  5. Virchow stated cells come from pre-existing cells
• Microscope was the key invention that led to the development of cell theory
• All living things are made up of at least one cell
• Cells can only be produced from pre-existing cells
• Microscopes are important in studying cells because most cells are very small
• Which of the following statement is NOT part of the cell theory?
• Only animal cells are composed of cells
• All cells are produced from other cells
• All living things are composed of cells
• The invention of microscope made it possible for people to discover and learn about

  cells
• Why microscopes are important in studying cells

  Most cells are very small
• Most cells are very small
• I


  Store molecules or send them into the cytosol or out of the cell. I process the proteins produced by the endoplasmic reticulum and ribosomes
• I


  Am the cell's transport system, there are two of me - the rough and the smooth. The rough type has ribosomes attached
• I


  Act like a digestive system in an animal cell. I contain enzymes that breakdown wastes and other materials
• I


  Absorb light energy from the sun and use it convert carbon dioxide and water to sugar and oxygen. I am not found in animal cells
• I


  Am the brain of the cell and I control all the activities of the cell. I am located in the cytosol, but you would not find me in prokaryotic cells
• I


  Am composed of a network of protein filaments that help maintain cell shape and cell movement
• I


  Am the jelly-like fluid inside the cell. I provide an area of movement for all the dissolved molecules that keep the cell working
• I


  Am found only in an animal cell, I help organize cell division. I look good with the triplets of microtubules that composed me
• I


  Am very large in plant cells, and I store water, food, and wastes. I help support the plant. When I start to shrink due to lack of water, the plant may wilt
• When a cell needs energy, I

  Take in nutrients, break them down, and supply energy to the cell. I can also convert stored energy in the cell to food
• We


  Build proteins in the cells. We can be found in several places in the cell, including in the cytosol and on the endoplasmic reticulum
• I

  Contain the enzyme catalase. I breakdown hydrogen peroxide in the cell environment
• I


  Am a thin protective layer around the cell, but I am not one solid piece. I have tiny openings that allow materials to pass in and out of the cell
• Organelles do the work to keep the cell alive. To keep you alive!
• Cell


  Like a factory
• Factory icons

  • Working site
  • CEO
  • Workers
  • Assembly line
  • Packaging department
  • Delivery team
  • Cleaning crew
  • Power plant