Tuesday, 15 January 2013

difusi

refugees and the Structure of Cells - Friend Pustakers, on this occasion Library School will share information about animal cells. The cell is the basic unit of the human body where each organ is gregasi / unification of the various cells that are united to one another by endorsement interselluler structures.
Each type of cell is devoted to perform a particular function. For example, the number of red blood cells 25 trillion serves to carry oxygen from the lungs to the tissues. In addition to red blood cells there are about 75 trillion cells that make up the human body else, so that the number of human cells in about 100 trillion cells. Although many cells are different from one another, but generally the whole cell sifar have basic properties that are similar to each other, for example:

• oxygen is bound to the carbohydrate, fat or protein in each cell to release energy;
• a common mechanism to change food into energy;
• each cell release final results to the fluid surrounding the reaction;
• almost all cells have the ability to conduct reproductive and if a particular cell gets damaged then other similar cells will regenerate
In general, the cells that make up the human body has a basic structure consisting of a cell membrane, protoplasm and the cell nucleus (nucleus). All three have a chemical composition consisting of water, electrolytes, proteins, fats and carbohydrates.
• Protein. Plays an important role in virtually all physiological processes and can be summarized as follows: Enzymatic Process; process of transport and storage; process of movement; mechanical function; immunological process; Founder and conductor of impulses in nerve cells and Managing the growth and regeneration.
• Fats. Fatty acids are a component of the cell membrane is a long hydrocarbon chain, while the fatty acids stored in the cell is triacylglycerol, a highly hydrophobic molecule. Because triacylglycerol molecule is not soluble in water / saline solution it will form lipid droplets in fat cells (adipose cells), which is a source of energy. Fatty molecules that make up cell membranes have hydroxyl groups (phospholipids and cholesterol) that can bind to the water, while the other hydrophobic groups (not tied to water) so-called amfifatik.
• Carbohydrates. A carbohydrate composed of atoms C, H, and O. Carbohydrates that have 5 C atoms are called pentoses, six C atoms called hexosa are carbohydrates that are essential for cell function. Carbohydrates are made up of many units called polysaccharides. Polysaccharides serve as a backup energy source and as components that make up the outer surface of the cell membrane. Carbohydrates that bind to proteins (glycoproteins) and that bind to fats (glycolipids) is an important structure of the cell membrane. Besides structuring glycolipids and glycoproteins blood group antigens that can induce an immunological reaction.
• Air. The main fluid medium of the cell is water, which is present in 70-85% concentration. Many chemicals cell soluble in water, while others are in the form of suspension or membranous.
• Electrolytes. The most important of the cell electrolyte is Potassium, Magnesium, Phosphate, Bicarbonate, Sodium, Chloride and Calcium. Inorganic electrolyte provides material for cellular reactions and mechanisms involved in the control cells.
Cytoplasm and organelles
Tues is not merely a bag containing liquids, enzymes and chemicals, but also contain physical structures are arranged so perfectly, called organelles and is essential for cell function. For example, in the absence of mitokhondria, then more than 95% of the energy supplied by the cell would soon disappear. Is dispersed in the cytoplasm of a variety of materials, namely globulus neutral fat, glycogen granules, ribosome, secretory granules, and five kinds of organelles important that the endoplasmic reticulum, the Golgi apparatus, mitokhondria, lysosomes and peroxisomes.

Cell Division and Function
1. Mitochondria, the energy source nerupakan spot formation. Commonly used by all living cells, because its function is very important, that produce energy by the process of cellular respiration (reaction between oxygen and food to produce energy)
2. Ribosomes, the organelles form of small granules contained in the cytoplasm or attached to the surface of the rough endoplasmic reticulum. Serves as the site of protein synthesis. Found in animal and plant cells.
3. Endoplasmic reticulum, an organelle shaped like a channel. Endoplasmic reticulum rough surface covered with ribosomes, endoplasmic reticulum smooth surface no ribosomes, but on the surface there are enzymes. Serves to harden the metabolism of proteins, fats and carbohydrates.
4. Golgi bodies, the organelle shaped like a stack of pancakes. Helps the protein synthesis. Found in plant and animal cells.
5. Lysosomes, a small bag with a single membrane. Serve to recycle damaged parts of the cell, digesting food waste substances or foreign substances that enter the cell. Found in plant and animal cells.
6. Centrosome, shaped like a small tube and float in the cytoplasm. Centrioles in the centrosome plays a role in cell division. Centrosome has a pair of centrioles of animal cells, plant cells sednag not.
7. Nuklues (cell nucleus), round or oval-shaped organelles located in the middle or the edge of the cell. Serves as the central control cell activity. In it there is a liquid core (nukleoplasma), son of nuclei (nucleoli) and selapu core. Found in animal and plant cells. '
8. Chloroplasts, the organelles small round green because they contain chlorophyll pigments. Only found in plant cells. Participate in the process of photosynthesis in plants, which produce energy and food plants.
9. The cell membrane (plasma membrane), is the outermost parts of the cell. Owned by animals and plants. Controls the entry and exit of substances in a cell.
10. Cell wall, is a layer beneath the cell membrane, made of cellulose. Only possessed by plant cells. Serves to give strength and protection for the cell.
11. Cytoplasm, clear liquid like gel that fills the space in the cell, serves as a venue for metabolic reactions.
12. Vacuole, a cavity in a layered cell membrane, which contains fluid. Serves as a place to store food and metabolic waste. Animal cell vacuoles are small, while large plant vacuoles.

  • Thus articles on animal cells: structure and function of the cell network, hopefully this article can certainly memebrikan useful information for us all. [Ps]

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