EARLY SCIENTISTS & BASIC CELLULAR FACTS - PowerPoint PPT Presentation

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EARLY SCIENTISTS & BASIC CELLULAR FACTS

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  1. INTRODUCTORY INFORMATION CELL STRUCTURE & FUNCTION EARLY SCIENTISTS & BASIC CELLULAR FACTS

  2. HE MADE A “MICROSCOPE” A SINGLE POWERFUL LENS LOOKED AT A DROP OF POND WATER AND SAW “ANIMALCULES” (PROTISTS) ANTON van LEEUWENHOEK1600’S

  3. CREDITED WITH DISCOVERING AND NAMING THE CELL USED ONE OF THE FIRST LIGHT MICROSCOPES VIEWED A SLICE OF CORK – SAW THE CELL WALLS OF CORK TISSUE; ITS STRUCTURE REMINDED HIM OF A MONASTERY’S TINY ROOMS CALLED CELLS ROBERT HOOKE1665

  4. Hooke’s microscope & findings I could exceedingly plainly perceive it to be all perforated and porous, much like a Honey-comb, but that the pores of it were not regular. . . . these pores, or cells, . . . were indeed the first microscopical pores I ever saw, and perhaps, that were ever seen, for I had not met with any Writer or Person, that had made any mention of them before this. . .

  5. GERMAN BOTANIST CONCLUDED THAT ALL PLANTS ARE MADE OF CELLS MATTIAS SCHLEIDEN

  6. GERMAN ZOOLOGIST CONCLUDED THAT ALL ANIMALS ARE MADE OF CELLS THEODOR SCHWANN

  7. GERMAN PHYSICIAN STUDIED CELL REPRODUCTION CONCLUDED “WHERE A CELL EXISTS, THERE MUST HAVE BEEN A PREEXISTING CELL” RUDOLF VIRCHOW

  8. ALL LIVING THINGS ARE MADE OF CELLS. CELLS ARE THE BASIC UNITS OF STRUCTURE AND FUNCTION IN LIVING THINGS NEW CELLS ARE PRODUCED FROM EXISTING CELLS CELL THEORY

  9. PROKARYOTIC – “NO TRUE NUCLEUS” OR CELLS THAT DO NOT HAVE MEMBRANE-BOUND ORGANELLES EUKARYOTIC – “TRUE NUCLEUS” OR CELLS THAT DO CONTAIN MEMBRANE-BOUND ORGANELLES TWO CATEGORIES OF CELLS

  10. ORGANELLES ARE: • CELL WALL • CELL MEMBRANE • RIBOSOMES • CYTOPLASM PROKARYOTES

  11. THE ONLY PROKARYOTIC ORGANISMS ARE THE BACTERIA REPRODUCE BY BINARY FISSION REPRODUCE EXPONENTIALLY REVIEW QUESTION: WHERE IS DNA FOUND IN A BACTERIAL CELL? PROKARYOTES

  12. CONTAIN MEMBRANE-BOUND ORGANELLES- SPECIALIZED STRUCTURES THAT PERFORM SPECIFIC CELLULAR FUNCTIONS PLANTS, ANIMALS, FUNGI AND PROTISTS ARE ALL EUKARYOTES EUKARYOTES

  13. ALL CELLS CONTAIN DNA – A NUCLEIC ACID; DNA IS NOT AN ORGANELLE; ALL CELLS HAVE A CELL MEMBRANE; NOT ALL CELLS HAVE A CELL WALL; ANIMAL CELLS NEVER HAVE A CELL WALL; IMPORTANT NOTES