Cell Theory and Cell Study

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					Cell Theory and Cell
       Study
        The Cell Theory
The    cell is the basic unit of
 structure of all living things.
All living things are made up of
 cells.
The cell is the basic unit of
 function of all living things.
Cells come from pre-existing
 cells.
       Do Now!
Answer  questions 1 + 2
on page 49 in UPCO text.
 Exceptions to the Cell Theory
These  are facts that can not be explained
 by the Cell Theory.
Viruses are not made up of cells, but they
 do contain genetic material.
The first cell could not have arisen from a
 previously existing cell, Scientists don’t
 know the origin of the first cell.
        Do Now!

Answer  question #1 on
page 50 in UPCO.
  History of Cell Study
Scientists  did not know much about cells
 until the discovery of the microscope.
Cells are so small they can not be seen w/o
 a microscope.
Anton van Leeuwenhoek- Dutch naturalist
 (1600’s). Developed the first microscope.
Robert Hooke- English (1665) was the first
 to develop a compound microscope. He
 came up with the term cell.
            History cont…..
 Robert  Brown- (1831) discovered the nucleus of
  the cell.
 Matthias Schleiden- (German, around 1830’s) a
  Botanist, concluded that all plants were made up
  of cells.
 Theodor Schwann- (German, worked during the
  same time as Schleiden), studied animal cells.
  Concluded that animals were made up of cells.
 Rudolf Virchow- (1858) concluded that all new
  cells must come from previously existing cells.
       Do Now!
Answer  questions 1-9,
page 51 in UPCO.
The Compound Microscope
 Microscopes   are used to study materials that can’t
  be seen with the naked eye.
 Microscopes use two lenses (compound
  microscope) to increase the size of a specimen.
 A specimen must be thin enough for light to pass
  through it.
 The total magnification of an object is found by
  multiplying the magnification of the objective x
  the magnification of the eyepiece.
  Parts of the Microscope
Look on page 52 in UPCO. Make
 sure that you know the parts of
 the Microscope, and the
 function of each part!
     Let’s Go to the Video!

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                 More Video !

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         Do Now!
Label each part of the
 Microscope on the ditto.
Do questions 1-6 on pages
 52-53 in UPCO.
        Homework

Read  and answer all
questions in UPCO, pages
61-62.

				
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