Hook's Cell Theory

1000 Words 4 Pages
The cell is the basic unit of life and is the smallest structure that can live an independent life. In 1665, Robert Hook was the first person to identify cells and name them. He also noticed that plants were made up of cells and this finding introduced the beginning of cell theory. Cell theory summaries Hook’s findings that cells make up all living organism, can only be produced from pre-existing cells and are the smallest living organism. The size of the cells is due a dependence on diffusion of different substances moving in and out of cell.

Fictional specialization allows for individual cells to coordinate tasks. “Structural variation in relation to function exists because each cell’s structure is exactly tailored to suit its function.
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It provides the basic structure for biological membranes. One side of the molecule is made up of hydrophilic molecules (water loving) and the other end is made up of hydrophobic molecules (water hating). Even though the bilayer is constantly moving, is still forms an effective and secure barrier around the cell. The plasma membrane is semi permeable and this allows for small molecules such as water and glucose to pass through. However larger molecules rely on the protein molecules within the membrane for passing in and out of the …show more content…
Due to the membrane being semi permeable, necessary molecules such as water, oxygen, glucose and urea can enter or leave the cell by different processes such as passive transport, Active transport and osmosis. The proteins within the cell membrane also play an important role as they help the cell communicate with the surrounding environment including other cells. The plasma membrane also serves as an area of attachment for other organelles within the cells internal environment such as the cell wall and the cytoskeleton. The plasma membrane is also essential for controlling homeostasis within the cell. It plays a very important role in maintaining internal conditions that are absolutely necessary for the cell to function properly and does this by controlling the exit and entry of certain substances.

In conclusion the cell membrane is the most important part of a cell because it provides protects the internal environment of the cell from harmful substances of molecules that are too large to enter the cell. The plasma membrane also helps to regulate homeostasis and due to its semi permeability substances that are essential for the cell to function can enter or exit the cell by specific substances carried out within the cell plasma

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