Metabolism, Biology

Metabolism

Metabolism as you know is a process by which living organisms acquire and use energy. A large number of biochemical reactions take place in the living organisms during various physiological activities. The sum total of all the biochemical activities of the organism is called metabolism. Broadly two types of biochemical reactions take place in the body. In one, 'simple substances combine to form complex substances. This is called anabolism and involves acquisition and storage of energy. The second, catabolism, produces simpler substances as a result of the break-down of complex ones, releasing energy. Metabolic reactions occur continuously and simultaneously in living organisms and when they cease the organisms die.

1200_Metabolism.png

                             Figure: Metabolic (anabolic and catabolic) reactions occur continuously in every living organism.

This figure shows the relationships of some metabolic activities. Some of the nutrients ingested by the organism are used to synthesize needed materials and cell parts; other nutrients are used as fuel for cellular respiration, a process that captures energy stored in food. This energy is needed for synthesis and for other forms of cellular work. Cellular respiration also requires oxygen, which is provided, by the process of gas exchange. Wastes from the cells such as carbon dioxide and water must he excreted from the body.

Posted Date: 1/12/2013 2:10:10 AM | Location : United States







Related Discussions:- Metabolism, Assignment Help, Ask Question on Metabolism, Get Answer, Expert's Help, Metabolism Discussions

Write discussion on Metabolism
Your posts are moderated
Related Questions
Explain Pancreatitis Pancreatitis :- Inflammation of the pancreas.

Ask question #What kinds of detritus or carrion can you observe in this ecosystem? Is there any evidence that scavengers, detritivores or decomposers are utilising this decomposing

Explain the Composition of Nutrient Agar and Nutrient Broth? The composition and procedure for preparation of some commonly used media, which we will use in the laboratory for

How is the genetic determination of sex established in humans? In the diploid genome of human beings there are 46 chromosomes, 44 of them are autosomes and two are sex chromoso

Q. Pathology of mitral regurgitation? During left ventricular systole as the pressure rises in left ventricle, blood is pumped simultaneously both into aorta and left atrium. T

An interesting observation made by an American biologist H.C. Bumpus (1899) provides a good explanation for normalising selection. Bumpus collected some 136 injured house sparrows

Which one of the following statements about morula in humans is correct? 1. It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA 2. It has far l


Define Vitamin A, Iron and Zinc required for elderly? Vitamin A, Iron and Zinc: The recommendation for iron is said to decrease in elderly women. Intake of vitamin E and zinc

State four long-term benefits of exercise. The long-term advantages of exercise are: a) Enhance in size of the muscles used, b) Decrease of heart rate and c)  Enhance