UNIT 1 - Ch5-CELL STRUCTURE & FUNCTION P. 87-102
TYPES OF CELLS <ul><li>Cells come in a variety of shapes and sizes that suit their diverse functions.  </li></ul>
OBJECTIVES <ul><li>1.  Explain  the relationship between cell shape and function.  </li></ul><ul><li>2.  Identify  the fac...
CELL DIVERSITY <ul><li>Not all cells are alike. Even cells within the same organism show Enormous Diversity in Size, Shape...
CELL SHAPE <ul><li>Most Cells have a Specific Shape.  </li></ul><ul><li>THE SHAPE OF A CELL DEPENDS ON IT'S FUNCTION.  </l...
CELL SIZE <ul><li>A few types of cells are large enough to be seen by the unaided eye. Eg. The Female Egg </li></ul><ul><l...
MOST CELLS ARE SMALL FOR  TWO REASONS : <ul><li>#1-Cells are limited in size by the RATIO of their  Surface Area to Volume...
COMPARING CELLS <ul><li>All cells share common features, such as a plasma membrane, cytoplasm, ribosomes, and genetic mate...
EUKARYOTIC vs PROKARYOTIC CELLS <ul><li>1. Prokaryotes differ from eukaryotes in that prokaryotes Lack a Nucleus and Lack ...
 
<ul><li>UNICELLULAR ORGANISMS such as bacteria and their relatives are Prokaryotes. </li></ul><ul><li>All other organisms ...
PLANT VS ANIMAL CELLS <ul><li>1. Three unique features distinguish plant cells from animal cells:  </li></ul><ul><li>(a) P...
 
UNIQUE FEATURES OF PLANT CELLS   <ul><li>To understand why plant cells have different structures Not found in animal cells...
CELL WALL - see fig 5-6 <ul><li>A Cell Wall DOES NOT REPLACE the Cell Membrane; it lies Outside the Cell Membrane.  </li><...
CELLS ORGANELLES <ul><li>You are responsible to know all of the cells organelles.  </li></ul><ul><li>You must be able to n...
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Unit1 lesson2-cells

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Unit1 lesson2-cells

  1. 1. UNIT 1 - Ch5-CELL STRUCTURE & FUNCTION P. 87-102
  2. 2. TYPES OF CELLS <ul><li>Cells come in a variety of shapes and sizes that suit their diverse functions. </li></ul>
  3. 3. OBJECTIVES <ul><li>1. Explain the relationship between cell shape and function. </li></ul><ul><li>2. Identify the factor that limits cell size. </li></ul><ul><li>3. Describe the three basic parts of a cell. </li></ul><ul><li>4. Compare prokaryotic cells and eukaryotic cells. </li></ul><ul><li>5. Compare plant and animal cells </li></ul><ul><li>6. Know the organelles and their functions </li></ul>
  4. 4. CELL DIVERSITY <ul><li>Not all cells are alike. Even cells within the same organism show Enormous Diversity in Size, Shape, and Internal Organization. Your Body contains at least 200 Different Cell Types. </li></ul>
  5. 5. CELL SHAPE <ul><li>Most Cells have a Specific Shape. </li></ul><ul><li>THE SHAPE OF A CELL DEPENDS ON IT'S FUNCTION. </li></ul><ul><li>Cells of the Nervous System that carry information from your toes to your brain are long and threadlike. </li></ul><ul><li>Blood Cells are shaped like round disk that can squeeze through tiny blood vessels. </li></ul>
  6. 6. CELL SIZE <ul><li>A few types of cells are large enough to be seen by the unaided eye. Eg. The Female Egg </li></ul><ul><li>Most cells are visible only with a microscope. </li></ul>
  7. 7. MOST CELLS ARE SMALL FOR TWO REASONS : <ul><li>#1-Cells are limited in size by the RATIO of their Surface Area to Volume. </li></ul><ul><li>A SMALL CELL HAS MORE SURFACE AREA THAN A LARGE CELL FOR A GIVEN VOLUME OF CYTOPLASM. </li></ul><ul><li>This is important because the nutrients, oxygen, and other materials a cell requires must enter through it surface. (figure 4-5) </li></ul><ul><li>#2 -THE CELL'S NUCLEUS (THE BRAIN) CAN ONLY CONTROL A CERTAIN AMOUNT OF LIVING, ACTIVE CYTOPLASM. </li></ul>
  8. 8. COMPARING CELLS <ul><li>All cells share common features, such as a plasma membrane, cytoplasm, ribosomes, and genetic material (DNA). </li></ul><ul><li>But there is a high level of diversity among cells, there are significant differences between prokaryotes and eukaryotes . In addition plant cells have features that are not found in animal cells, although both plant and animal cells are eukaryotic cells. </li></ul>
  9. 9. EUKARYOTIC vs PROKARYOTIC CELLS <ul><li>1. Prokaryotes differ from eukaryotes in that prokaryotes Lack a Nucleus and Lack Membrane-Bound Organelles. </li></ul><ul><li>2. In place of a nucleus, prokaryotes have a region called a Nucleoid in which their genetic material is concentrated. </li></ul><ul><li>3. Prokaryotes lack an internal membrane system. </li></ul>
  10. 11. <ul><li>UNICELLULAR ORGANISMS such as bacteria and their relatives are Prokaryotes. </li></ul><ul><li>All other organisms are Eukaryotes; plants, fish, mammals, insects and humans. </li></ul><ul><li>The difference between Prokaryotes and Eukaryotes is such an important distinction that Prokaryotes are placed in Two Domains Separate from Eukaryotes - Domains Bacteria and Archaea. </li></ul>
  11. 12. PLANT VS ANIMAL CELLS <ul><li>1. Three unique features distinguish plant cells from animal cells: </li></ul><ul><li>(a) Plant cells have cell walls. </li></ul><ul><li>(b) Plant cells contain a large central vacuole. </li></ul><ul><li>3) Plant cells contain a variety of Plastids which are not found in animal cells </li></ul><ul><li>4) BOTH ARE EUKARYOTIC CELLS </li></ul>
  12. 14. UNIQUE FEATURES OF PLANT CELLS <ul><li>To understand why plant cells have different structures Not found in animal cells, consider how a plant's lifestyle differs from and animal's. </li></ul><ul><ul><li>Plants make there own carbon-containing molecules (food) directly from carbon dioxide in the environment in a process called Photosynthesis , they convert carbon dioxide, water and energy from the sun into sugars - Autotrophs. </li></ul></ul>
  13. 15. CELL WALL - see fig 5-6 <ul><li>A Cell Wall DOES NOT REPLACE the Cell Membrane; it lies Outside the Cell Membrane. </li></ul><ul><li>The Rigidity of Cell Walls Helps SUPPORT and PROTECT the Plant. </li></ul><ul><li>Cell Walls of Plants contain POLYSACCHARIDE (long chains) CELLULOSE a complex carbohydrate. </li></ul>
  14. 16. CELLS ORGANELLES <ul><li>You are responsible to know all of the cells organelles. </li></ul><ul><li>You must be able to name, identify, and know the functions of them all </li></ul><ul><li>Read p. 89-98 and complete the structure function graph provided </li></ul><ul><li>THIS IS REVIEW FROM LAST YEAR </li></ul><ul><li>You will have a quiz on these next class! </li></ul>
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