Exploration of Light Microscopes

Exploration of Light Microscopes

What does the word microscope mean: The first part of the word "Micro"

means tiny. The "scope" part means to look at or view. Microscopes are

tools that are used too enlarge images of small objects so that they

can be studied.

A light microscope is an instrument made up of two lens they are

eyepiece lens and the object lens combined they produce a much greater

magnification that what is possible with just one single lens. The

microscope also has a variety of knobs to focus the picture seen

thought the microscope. The light microscope is also known as the

compound microscope this is because it uses more than one lens.

The light microscope uses visible light to detect small objects; the

microscope consists of an optical instrument that magnifies the image

of an object. It is probably the most used research tool in biology.

The total magnification is calculated by multiplying the magnification

of the two lenses inside the microscope. Images looked at under the

light microscope are reversed and inverted.

Functions Of The Components Seen Under A Light Microscope

---------------------------------------------------------

Cytoplasm: is a partly fluid material, which can flow slowly and in

which many other substances are suspended such as large fat and

protein molecules. Many of the chemical reactions take place in the

cytoplasm, which will provide the cell with energy and allow it to

build up larger molecules that it needs. Studying the cell further and

using better more powerful microscopes has shown that the cytoplasm

actually contains lots of small structures called organelles. These

...

... middle of paper ...

...nd

squirt the wastes outside.

Ribosome: Have sub cellular particles on which proteins are

synthesized. Bacterial ribosome is approximately 20 nm or 200 A

(angstroms) in diameter. In higher organisms, ribosome is associated

with internal cell membranes (the endoplasmic reticulum) protein

synthesis in mitochondria or chloroplasts uses ribosome smaller than

and different from those in the cytoplasm.

Lysosome: A lysosome is a membrane bag containing digestive enzymes.

When a cell needs to digest food, the lysosome membrane fuses with the

membrane of a food vacuole and squirts the enzymes inside. The

digested food can then diffuse through the vacuole membrane and enter

the cell to be used for energy or growth. The only thing that keeps

the cell itself from being digested is the membrane surrounding the

lysosome.