The Structure And Function Cell Biology High School

Intellectual greetings. Good after yesterday I post material SebagaiUnit Smallest Cell Biology of Life so now I post the subsequent material, which is about the structure and function of cells. For more details, please read and understand the following explanation:

Definition and Structure of Cells
Kinds of cells existing structure, namely:
* multicellular animal cell structure,
* The structure of plant cells,
* Cell structure unicellular animals (protozoa),
* Bacterial cell structure, and
 * unicellular algae cell structure.

Various kinds of Cells
Before more in discussing about the cell, the cell structure and cell organelles, let us know briefly kinds of cells that exist today. Broadly speaking, the cell is divided into two based on the presence or absence of nuclear membrane that eukaryotic cells (have a nuclear membrane) and prokaryotic cells (do not have a nuclear membrane). This is an outline of all branches divide living things that we know today. Starting from archaebakteria, bacteria and eubacteria (all living organisms other than bacteria and archaebacteria).

Furthermore, cells divided more specifically into cells of unicellular animals (protozoa), unicellular algae cells, cell fungi (hyphae), plant cells, multicellular animal cells, bacterial cells, cell archaebakteria, and various types of existing cell differentiation. Whole cells that is all tailored to the habitat they are, and they need to remain sustainable.


Understanding cell structure of multicellular animals
You know what that make up your body? It is animal cells together to form tissues, and organs and organ systems and be human. Understanding animal cells are cells that have the protoplasm and the cell membrane but do not have a cell wall as well as the ability to photosynthesize, besides understanding animal cell is a cell that is heterotrophic organisms and do not have a cell wall.

Animal cell structure is generally composed of cell membranes and protoplasm. Protoplasm animal cells are cytoplasm and the cell nucleus (nucleus) as well as cell nuclei or nukleoulus child. In the cytoplasm of animal cells, there are several organelles such as ribosomes, mitochondria, lysosomes, smooth and rough endoplasmic reticulum, the Golgi apparatus / Golgi apparatus, centrioles, peroxisomes. Animal cells, as described in the above definition of animal cells, do not have a cell wall but has called the extracellular matrix of the cell casing.



The structure of the animal cell and organelle organelles animal cells
The function of the animal cell organelles mentioned above are described as follows:


Mitochondria function
Mitochondria function as "energy factories" for animal cells. ATP as an energy animal cells and many other cells. With the mitochondria, the nutrients which have been processed or diglikolisis in the cytoplasm as anarobik process will be entered into the mitochondria as acetyl co-A and then with the help of oxygen will be enhanced in the mitochondria. Read more details about this in the article organelle mitochondria and mitochondrial function


Endoplasmic reticulum function
Endoplasmic reticulum strong role in the synthesis of substances or molecules needed by animal cells, especially for cell regeneration and cell growth and development. Smooth endoplasmic reticulum plays an important role in the synthesis of lipids or fats while the rough endoplasmic reticulum (with the help of ribosomes) play a role in protein synthesis. For more jelaskanya about the structure of the animal cell organelles and functions, please read the article about the endoplasmic reticulum and functions


Function Golgi Apparatus / Golgi Apparatus
Cell organelle this one looks like a bearing with a grain of granular vesicles around. Golgi body itself has a function related to protein synthesis and in cooperation with the endoplasmic reticulum and ribosomes, besides, as organelles that function in the maintenance of animal cells and other cells (which have) to deliver the required substances using mikrovesikel. In addition, the process of exocytosis in animal cells occurs in the presence of this Golgi body.


The function of lysosomes
Lysosomes are organelles animal cells which have a unique structure that has a single membrane organelles that function as a "cleaner" animal cell cytoplasm. Lysosomes measuring about 0.25 um to 0.5 um-containing enzymes in the organelle its hydrolytic enzymes that can digest a variety of substances composed of proteins, fats and carbohydrates even phosphate. With the help of lysosomes, animal cells can destroy substances are difficult to decompose, recycling of cell organelles were damaged.

Peroxisome function
Peroxisomes are organelles found in all eukaryotic cells. Peroxisomes have a single membrane as well as lisosom.Organel cells containing approximately 50 of these enzymes help in the process of oxidative animal cells. In animal cells, peroxisomes play a role in the reform process fatty acids and cell toxins like alcohol and simultaneously H2O2 by using the enzyme catalase. One important function of peroxisomes for animals is as a catalyst in the first reaction plasmalogen formation is needed in the formation of myelin nerve cells.

Centrioles function
Centrioles are organelles animal cells that play an important role in the process of cell division animals. Through centrioles, yarn division will appear (spindle) that separates homologous chromosomes so attracted to the centrioles that has been split as well (at the poles, respectively).

In addition to the above cell organelles, cytoskeleton there that has a structure like a frame which keeps the shape of animal cells. Although not as organelles of animal cells (because it is located outside the cytoplasm), animal cells also have flagella that play a role in animal cell motility (movement) of sperm cells in particular instances. In addition, there is also mikrovilis (mikropili).


Definition and structure of plant cells
Drafting a variety of plants that you saw yesterday and today, is composed of cells of plant cells which then form a network of plants. Understanding plant cells are cells that have the protoplasm, cell membrane and cell wall composed of cellulose (or hemi-cellulose) and chloroplasts in the cytoplasm so that it can carry out photosynthesis. Understanding plant cells from the other side is a cell that is capable of forming his food and energy by using light energy or fotoautotrof aid with the help of chloroplasts and chlorophyll.
The cell structure of plants ranging from the outside, you can find the cell walls are thick but have a tiny slits where the entry of substances needed, after that, then the cell membrane. The cell membrane is the same with animal cell membranes, composed of a phospholipid bilayer. Then organelle organelles similar to animal cells will be found in the plant cells (except centrioles which only exist in plant cells are motile). In addition, you can see the vacuoles in animal cells and a much smaller but in plant cells generally only amounted to one and a large and located in the middle so-called central vacuole.

Definition and Structure of a bacterial cell
Understanding the simple bacterial cells are cells that are in a prokaryotic cell group. Understanding the bacterial cell is a cell that the cell walls but do not have a nuclear membrane and organelles except ribosomes and other organelles mesosom (organelles while).
Although the structure of the bacterial cell has a cell wall but different cell wall constituent of plant cell. The difference lies in the content of peptidoglycan in the cell wall of bacteria. Differences in the amount of peptidoglycan in the bacterial cell wall makes it formed two kinds of bacteria are gram-negative and gram-positive bacteria.

Bacterial cells have a variety of forms ranging from cocci (round), rod (bacillus) and spiral. One thing you have to emphasize the bacterial cells are, bacterial cells do not have a nuclear membrane so that the spread of bacteria cell nucleus in the cytoplasm.

The cell structure Protozoa: Amoeba Proteus
Amoeba Proteus is a unicellular animal cells. Why are categorized as animal cells? Because the amoeba has the characteristic feature of animal cells, namely motility, and cell structure it has. The difference with multicellular animal cells is the organ system that is owned by the amoeba performed by organelles organelle has, so there are differences in cell organelles organelle.
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Now that's an explanation of the structure and function of cells may be understood and beneficial to the learning process you yaahhhhh .. okkeyyy

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