Overview of the Cellular Basis of Life Flashcards
1
Q
Who discovered the cell?
A
In 1665, Robert Hook discovered cells when he was observing cork. He saw cube-like structures that reminded him of the cells in a monastery.
2
Q
List the four elements of cell theory that make up the bulk of living matter.
A
- A cell is the basic structural and functional unit of living organisms.
- The activity of an organism depends on the collective activities of its cells.
- According to the principle of complementarity, the biochemical activities of cells are dictated by the relative number of their specific subcellular structures.
- Continuity of life has a cellular basis
3
Q
What percentage of a cell is water?
A
About 60%
4
Q
All exchanges between cells and blood are made through what fluid?
A
A dilute saltwater solution (something like seawater) called interstitial fluid.
5
Q
How many cells do humans have?
A
50 to 100 trillion
