Cell Theory Flashcards
What were the 2 main theories that people thought were the cause of many deaths in 1854?
- Miasma
2. Germ
Explain the Miasma Theory.
The belief that diseases are spread by poisonous vapour in which were suspended particles of decaying matter that was characterised by its foul smell.
Explain the Germ Theory.
The belief that diseases are caused by microorganisms.
What did Hans and Zacharias Jannsen contribute to the cell theory?
Finding the first compound microscope
What did Anton van Leeuwenhoek contribute to the cell theory?
- Created the simple microscope
2. First to find bacteria, but called them Animalcules
What did Robert Hooke contribute to the cell theory?
The first to learn about cells under the microscope.
How did Robert Hooke name cells?
While looking under the microscope the cells reminded him of cells that monks lived in.
Who were the 3 scientists that created the cell theory?
- Matthias Schneiden
- Theodore Schwann
- Rudolf Virchow
What did Matthias Schneiden learn about plants?
They’re made of cells!!!!
What did Theodore Schwann learn about animals?
They’re made of cells!!!!
Theodore Schwann was a strong believer in what?
Free Cell Formation
What is Free Cell Formation?
Cells are created randomly and pop out of nowhere
Rudolf Virchow what did he contribute to the cell theory?
Cells are regenerated through cell division
What are the 3 original explanations of the cell theory?
- All organisms are composed of one or more cells
- The cell is the basic unit of structure and organization of organisms
- All cells come from preexisting cells
Name the 4 additions to the cell theory.
- The cell contains DNA which is passed on through cell division
- All cells share the same chemical composition and metabolic activities
- All basic chemical and physiological functions are carried out inside the cells
* Movement, Digestion, etc - Cell activity depends on the activities of sub-cellular structures within the cell
* Organelles, nucleus, plasma membrane
