Tour of the Cell Biology Paper
Learning about Cells.
First thing I want to show you is two beautiful pictures of a Cell. Imagine all of this is in something so small we cannot see it with our naked eyes. About 10,000 average-sized human cells can fit on the head of a pin. There are a few exceptions, but the average cell is very tiny.
Here are a few beautiful examples of a cell structure to kind of give you an idea of its beauty, and how they fit together.
Plasma Membrane (cell membrane)
First we are going to learn about the Plasma membrane it is also called the cell membrane. No, it is not the same thing as the Plasma Tv. Most of you are probably familiar with. As you can see with the above picture the Plasma membrane is on the outer side of the cell. Plasma membrane is what separates the interior of the cell from the outside environment. It is like the peel on an orange. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. It is basically the fence that protects the cell from outside forces. It does allow a few things through though. Carbon Dioxide, oxygen and water are mostly what it allows through.
The cell membrane also plays a role in anchoring the cytoskeleton to provide shape to the cell, and in attaching to the extracellular matrix and other cells to help group cells together to form tissues.
Biological membranes can be considered as a two-dimensional liquid in which all lipid and protein molecules diffuse more or less easily. Although the lipid bilayers that form the basis of the membranes do form two-dimensional liquids by themselves, the plasma membrane also contains a large quantity of proteins, which provide more structure. Here is an illustration of the Cell Membrane or Plasma membrane.
The Nucleus
Next I want to tell you about the core or center of the cell. The nucleus is the center of the cell. Yes, we skipped from the outermost to the innermost part of a cell. The Nucleus is
First thing I want to show you is two beautiful pictures of a Cell. Imagine all of this is in something so small we cannot see it with our naked eyes. About 10,000 average-sized human cells can fit on the head of a pin. There are a few exceptions, but the average cell is very tiny.
Here are a few beautiful examples of a cell structure to kind of give you an idea of its beauty, and how they fit together.
Plasma Membrane (cell membrane)
First we are going to learn about the Plasma membrane it is also called the cell membrane. No, it is not the same thing as the Plasma Tv. Most of you are probably familiar with. As you can see with the above picture the Plasma membrane is on the outer side of the cell. Plasma membrane is what separates the interior of the cell from the outside environment. It is like the peel on an orange. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. It is basically the fence that protects the cell from outside forces. It does allow a few things through though. Carbon Dioxide, oxygen and water are mostly what it allows through.
The cell membrane also plays a role in anchoring the cytoskeleton to provide shape to the cell, and in attaching to the extracellular matrix and other cells to help group cells together to form tissues.
Biological membranes can be considered as a two-dimensional liquid in which all lipid and protein molecules diffuse more or less easily. Although the lipid bilayers that form the basis of the membranes do form two-dimensional liquids by themselves, the plasma membrane also contains a large quantity of proteins, which provide more structure. Here is an illustration of the Cell Membrane or Plasma membrane.
The Nucleus
Next I want to tell you about the core or center of the cell. The nucleus is the center of the cell. Yes, we skipped from the outermost to the innermost part of a cell. The Nucleus is