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Summary University of Waterloo: BIOL130 Unit 0 Notes (Typed) CA$4.18   Add to cart
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Summary University of Waterloo: BIOL130 Unit 0 Notes (Typed)
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BIOL130 is an introductory course at the University of Waterloo for all biology-related courses. This course is an introduction to cell biology. Unit 0 talks about the beginning of cells, properties, classes of cells, comparing plant and animal cells, and the transportation in and out of the cell. ...

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  • January 16, 2024
  • 9
  • 2023/2024
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Unit 0
Microscope
● Inventor → Hans Lippershey, Hans & Zacharias Janssen

Cells
● First person to name cells → Robert Hooke
○ Viewed slices of tree bark

Magnifier Lens Maker
● Antonie Van Leeuwenhoek (Father of microbiology)
● Worked with glass → Improved quality of lenses
● First to observe;
○ Single cell protists
○ Bacteria from the mouth
○ Blood cells
○ Muscle cells (banded pattern)
○ Giardia, sperm

Compound Microscope
● Visualization of objects less than 1um
● Some organelles and cells are in the same size scale
○ Bacteria

Robert Brown (Botanist)
● Found “kernel” (later known as the nucleus) in plant cells

Matthias Schleiden (Botanis)
● All plant tissues have cells

Theodor Schwann (Zoologist)
● Similar observations in animal cells
○ Noticed the plant and animal cells have many similarities
● Created the “Cell Theory”

Cell Theory
● All organisms consist of one more more cells
● The cell is the basic unit of structure for all organisms
● All cells have to come from preexisting cells (added 20 years later)

, Fact (scientific):
● An attempt to state our best current understanding
○ Based on observations and experiments
● Then revised or replaced when there were better observations

Scientific Method
● Make observations
● Develop the hypothesis
● Make predictions based on the hypothesis (if, then, so)
● Interpret the result to see if it matches the hypothesis

Theory
● A hypothesis that has been tested critically
○ Under different conditions
○ By many investigators using different approaches
● Must be widely accepted to be called a theory
● “Solid ground” of science
○ Evolution theory, germ theory, cell theory

More than a theory (Law)
● If is tested and confirmed over many years by many investigators and there is not doubt
in its validity
● Gravity
● Laws of thermodynamics
● Laws that govern the behaviour of gasses
● Biologists don’t use the term law

‘Strands’ of Cell Biology
● Cytology → what they look like

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