Antioxidants system in the human body essay

Avoiding grammar mistakes The Harmful and Beneficial Effects of Antioxidants Supplements Antioxidants supplements exist both in natural and artificial forms and are believed to play a crucial role in the immune system of human beings.

Antioxidants system in the human body essay

As with the chemical antioxidants, cells are protected against oxidative stress by an interacting network of antioxidant enzymes. This detoxification pathway is the result of multiple enzymes, with superoxide dismutases catalysing the first step and then catalases and various peroxidases removing hydrogen peroxide.

As with antioxidant metabolites, the contributions of these enzymes to antioxidant defenses can be hard to separate from one another, but the generation of transgenic mice lacking just one antioxidant enzyme can be informative. Here, its cofactor is oxidised by one molecule of hydrogen peroxide and then regenerated by transferring the bound oxygen to a second molecule of substrate.

Plants, such as Arabidopsis thalianahave a particularly great diversity of isoforms. In its active state, thioredoxin acts as an efficient reducing agent, scavenging reactive oxygen species and maintaining other proteins in their reduced state. There are at least four different glutathione peroxidase isozymes in animals.

How To Successfully Lose Weight Essay How To Lose 20 Pounds In 20 Days Safely How Long To Lose Pounds On Low Carb How Can Kids Lose Weight In A Day How To Lose The Most Belly Fat In A Month The reduction supplement patch been recently around for countless years. Nov 24,  · The glutathione system includes glutathione, glutathione reductase, glutathione peroxidases and glutathione ''S''-transferases/5(4). Organ Systems of the Human Body The human body is made up of 11 organ systems. The Integumentary System, Skeletal System, Muscular System, Nervous System, Endocrine System, Circulatory System, Lymphatic System, Respiratory System, Urinary System, Digestive System, and Reproductive System for the male and female.

Surprisingly, glutathione peroxidase 1 is dispensable, as mice lacking this enzyme have normal lifespans, [] but they are hypersensitive to induced oxidative stress.

Here, low density lipoprotein LDL oxidation appears to trigger the process of atherogenesiswhich results in atherosclerosisand finally cardiovascular disease.

Antioxidants system in the human body essay

Several antioxidant enzymes such as superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione S-transferase etc.

This effect may involve a reduction in oxidative stress. Exposure to oxygen and sunlight are the two main factors in the oxidation of food, so food is preserved by keeping in the dark and sealing it in containers or even coating it in wax, as with cucumbers.

However, as oxygen is also important for plant respirationstoring plant materials in anaerobic conditions produces unpleasant flavors and unappealing colors.

Antioxidants are an especially important class of preservatives as, unlike bacterial or fungal spoilage, oxidation reactions still occur relatively rapidly in frozen or refrigerated food.

Antioxidants system in the human body essay

Thus, these foods are rarely preserved by drying; instead, they are preserved by smokingsalting or fermenting. Even less fatty foods such as fruits are sprayed with sulfurous antioxidants prior to air drying.

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Oxidation is often catalyzed by metals, which is why fats such as butter should never be wrapped in aluminium foil or kept in metal containers. Some fatty foods such as olive oil are partially protected from oxidation by their natural content of antioxidants, but remain sensitive to photooxidation.

Industrial uses[ edit ] Substituted phenols and derivatives of phenylenediamine are common antioxidants used to inhibit gum formation in gasoline petrol. Antioxidants are frequently added to industrial products.

A common use is as stabilizers in fuels and lubricants to prevent oxidation, and in gasolines to prevent the polymerization that leads to the formation of engine-fouling residues.

They can be protected by antiozonants. Solid polymer products start to crack on exposed surfaces as the material degrades and the chains break. The mode of cracking varies between oxygen and ozone attack, the former causing a "crazy paving" effect, while ozone attack produces deeper cracks aligned at right angles to the tensile strain in the product.

Oxidation and UV degradation are also frequently linked, mainly because UV radiation creates free radicals by bond breakage. The free radicals then react with oxygen to produce peroxy radicals which cause yet further damage, often in a chain reaction.

Other polymers susceptible to oxidation include polypropylene and polyethylene. The former is more sensitive owing to the presence of secondary carbon atoms present in every repeat unit. Attack occurs at this point because the free radical formed is more stable than one formed on a primary carbon atom.

Antioxidant Enzyme Systems

Oxidation of polyethylene tends to occur at weak links in the chain, such as branch points in low-density polyethylene.The human body has been regarded as a machine which has to do certain kinds of work or perform certain functions.

These functions are: (i) Motion and locomotion (ii) Nutrition, which includes the digestion of food, respira­tion or breathing, the circulation of the blood etc. How To Successfully Lose Weight Essay How To Lose 20 Pounds In 20 Days Safely How Long To Lose Pounds On Low Carb How Can Kids Lose Weight In A Day How To Lose The Most Belly Fat In A Month The reduction supplement patch been recently around for countless years.

Antioxidants (ISSN ; CODEN: ANTIGE) is an international peer-reviewed open access journal published monthly online by MDPI. The International Coenzyme Q10 Association (ICQ10A) is affiliated with Antioxidants and their members receive discounts on the article process charges..

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Open Access free for readers, with article processing charges (APC) paid by authors or their institutions. Antioxidants System in The Human Body Essay - Introduction Oxidative stress is essentially defined as the imbalance in the equilibrium of antioxidants systems in the human body.

Oxidative damage in aerobic organisms can be caused by certain molecules known as reactive oxygen species (ROS). Nov 24,  · The glutathione system includes glutathione, glutathione reductase, glutathione peroxidases and glutathione ''S''-transferases/5(4).

The relative importance of the antioxidant and pro-oxidant activities of antioxidants is an area of current research, but vitamin C, which exerts its effects as a vitamin by oxidizing polypeptides, appears to have a mostly antioxidant action in the human body.

Antioxidant - Wikipedia