LESSON 1 Flashcards
in 1950 Zacharias Janssen invented the
microscope
while looking at the piece of cork under the microscope Robert Hooke saw box-shaped structures that he called
cell
in 1674 anton van Leeuwenhoek (father of microbiology) while looking at a pond water under the microscope, observed what he called
animalcules
in 1838, Mathias schleiden a germal botanist, stated that plants are made up of
cells
in 1839 Theodor Schwann a German physiologist conclude that animals are also made up of
cells
in 1855 Rudolf Virchow stated that cells come from pre-existing cells through
cell division
the 19th century contains 3 postulates and these are:
1. All living things are made up of cells.
2. Cells are the basic unit of structure and function in an organism.
3. Cells come from pre- existing cells.
there were 3 added postulates to the cell theory due to the modernization
4. Cell carry genetic material which is passed from one cell to another during cell division .
5. All cells are basically the same in structure and chemical composition.
6. Energy flow ( biochemical processes )
occurs within cells
literally means little organs
organelles
specialized structures found within the cell which perform specific function vital to a a cell's life
organelles
a thin double layer of protein and fat
cell membrane
separates the inner contents of the cell with its environment
cell membrane
regulates the passage of materials in and out of the cell
cell membrane
Security guard
cell membrane
a rigid membrane surrounding plant cells made up mostly of cellulose
cell wall
gives the cell protection, support, and structure
cell wall
a membrane-bound spherical body discovered by Robert Brown in 1831
nucleus
stores the cell's DNA
nucleus
controls and regulates cell activities
nucleus
controls the synthesis of ribosomes and proteins
nucleus
brain of the cell
nucleus
a spherical body found inside the nucleus
nucleolus
•produces and assembles ribosomes
nucleolus
