Introduction
Metabolism came from the Greek word “metabole” which means change; it can be referred as the main sources of all chemical reactions that occurs in the living organisms which includes digestion, and the transport of substances into, and between different cell that set reactions within the cells known as intermediary metabolism or intermediate metabolism. Moving forward, metabolism is the set of life sustaining chemical transformations within the cells organisms. Also, it has three major purposes; these purposes include, but not limited to conversion of food or fuel to energy to run cellular processes.
However, food and fuel are equally converted into building blocks of lipids, nucleic acids, proteins, some carbohydrates, and elimination
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Glucose is the most important of carbohydrate because it’s a simple sugar that metabolized all the organisms. With the same manner, glucose and other carbohydrates are part of metabolic pathways across all species. Energy obtained from metabolism is stored briefly within cells in the form of ATP. Then again, carbohydrates can be chemically divided into two types; and there are complex, and simple. Simple carbohydrates contain of single or double sugar units named monosaccharides and disaccharides, respectively. Common example of a simple carbohydrate is sucrose or table sugar. Complex carbohydrates consist of three or more sugar units that are linked in a chain that contains hundreds of thousand sugar …show more content…
Before adenosine triphosphate can be used as energy, proteins, and fats must be transformed to ATP. Transformation of protein to ATP is an expensive process that requires a lot more ATP as it produces; which results energy to gain equivalent as many as four, and as small as zero calories per gram of protein. On the other hand, fats are easily broken down and transformed to ATP; causing energy to gain nine calories per gram of fat. Notwithstanding the modifications between fat and protein, metabolism is still not carried out as a separate process. However, carbohydrates, fats, and proteins have the capacity to convert and store excess food energy as body fat. As a matter of facts, human body converts proteins into energy or body fat; in a situation whereby, the body consumed few fats or carbohydrates. Also, with the present of nitrogen body can convert glycerol from triglycerides to nonessential amino
Animal metabolism consists of the utilization of nutrients absorbed from the digestive tract and their catabolism as fuel for energy or their conversion into substances of the body. Metabolism is a continuous process because the molecules and even most cells of the body have brief lifetimes and are constantly replaced, while tissue as a whole maintains its characteristic structure. This constant rebuilding process without a net change in the amount of a cell constituent is known as dynamic equilibrium (Grolier1996). In the combustion of food, oxygen is used and carbon dioxide is given off. The rate of oxygen consumption indicates the energy expenditure of an organism, or its metabolic rate (Grolier1996).
Mader, S. S. (2010). Metabolism: Energy and Enzymes. In K. G. Lyle-Ippolito, & A. T. Storfer (Ed.), Inquiry into life (13th ed., pp. 105-107). Princeton, N.J: McGraw Hill.
Lipid metabolism is one source of energy for the human body. We eat food containing one form of lipids, triacylglycerols. Before starting lipid metyabolism, these fats get broken down into droplets by bile salts.Triacylglycerols can be broken into fatty acids plus glycerol via hydrolysis with the help of the pancreatic lipase enzymen and then get used by cells for energy by breaking down even further. Once the pancreas and cells have enough energy and don’t need to absorb anymore, fatty acids get synthesized back into triacylgleryols. The excess triacylglycerols get stored in adipose tissue. Excess storage leads to weight gain and obesity.
Carbohydrates are biomolecules that consist of a chain or ring of carbon atoms attached to hydrogen and oxygen atoms. The simplest formula for carbohydrates is (CH2O)n. Carbohydrates are important to organisms for a variety of reasons. They are used to form the structural components of the cell, aid in energy storage, and serve as intermediary compounds for more complex molecules. Carbohydrates are classified as either monosaccharides, disaccharides, or polysaccharides. Both monosaccharides and disaccharides dissolve easily in water. Carbohydrates are produced in plants through the process of photosynthesis and animals obtain these carbohydrates by eating the plants. ("BIO 1510 Laboratory Manual," 2016)
Carbohydrates are categorised in three many groups: Ø Monosaccharide – monomers and therefore contain single surgar. Ø Disaccharide – contain double sugars. Ø Polysaccharide – are large molecules containing many complex sugars. The general formula for carbohydrates is Cx(H20)y. Monosaccharides are white crystalline solids with low molecular mass and sweet tasting.
During catabolism, chemical energy such as ATP is released. The energy released during catabolism is released in three phases. During the first phase, large molecules are broken down. These include molecules such as proteins, polysaccharides, and lipids. These molecules are converted into amino acids and carbohydrates are converted into different types of sugar. The lipids are broken down into fatty acids
The absorptive state is the time during and right after eating a meal. The absorptive state lasts for four hours, during and after each meal. During this state glucose is the most important energy fuel. Amino acids and fats are used to form degraded protein, and small amounts are used to provide ATP. Metabolites are transformed to fat if they are not used for anabolism. Glucose is formed by the conversion of fructose and galactose, which are stored in the liver from the entrance of monosaccharides. Glucose is released into the blood, or converted to glycogen and fat. Some glucose enters the liver and is used for energy, and any that is not used will be stored in skeletal muscle as glycogen or in adipose cells as fat. Liver, skeletal muscle, and adipose cells use triglycerides as their primary energy source. Amino acid are also used by the liver to synthesize plasma proteins. Essentially all of the events that occur in the absorptive state are directed by insulin.
Our body needs energy to carry out its functions properly. This energy is synthesized from the food we eat. Our body breaks down the food we take in and then build up the required materials for a healthy functioning of our body. Glucose, a simple sugar or monosaccharide that is the end product of carbohydrate digestion, is a primary source of energy for living things. (Taber’s, 2005). Glucose gets absorbed from our intestines and distributed by the bloodstream to all of the cells in our body. If the supply of glucose is more than required, our body stores the excess amount of glucose as glycogen, a chain of glucose. If there is shortage in other hand, our body uses the stored...
It can be turned into energy through each person’s unique metabolism. The main reaction that takes place in the digestive system is called Metabolism. Metabolism takes place everywhere, but mainly in the stomach where is breaks down substances into smaller molecular forms, which gives the body energy (Encyclopedia Britannica Online School Edition, 2011). Our metabolisms are chemical reactions that are carried out through a microcellular catalyst called an enzyme. Enzymes help chemically break down large nutrients, proteins, fats and carbohydrates into smaller forms of amino acids, fatty acids and simple sugars (Encyclopedia Britannica Online School Edition, 2011). Amino acids and fatty acids are mainly where we get our energy from. The whole process starts when we eat and our metabolism breaks down the food. The amino acids and fatty acids are absorbed into the blood where once they attach to a cell, they are then able to speed up the chemical reactions taking place while the amino and fatty acids are monitoring the reactions in the cell some energy is released. This energy can be stored in the body until it is needed (Encyclopedia Britannica Online School Edition, 2011). There are two forms of metabolism called anabolism and catabolism. Anabolism is storing energy and maintaining cells while catabolism is all about making energy so that each cell has a specific amount to
Our metabolism, “the totality of an organism’s chemical reactions”, manages energy usage and production of cells. We use energy constantly and our metabolism breaks down food through complex chemical reactions into energy our cells
Metabolism is the rate at which the body uses energy to support the basic functions essential to sustain life. This metabolism is comprised of three parts,which include physical activity (20%), Thermic Effect of Food, also called TEF (10%), and Resting Metabolism Rate or REM (70%).
The most important nutrient categories are starches, minerals, sugars, and electrolytes. Starches and minerals fit into the area of complex carbohydrates. Complex carbohydrates are polysaccharides (many sugars bonded together). Because of the multiple bonds, polysaccharides are able to store energy for later use. Simple sugars make up the other group of carbohydrates. The bonding structures of simple sugars are much less advanced that than those of complex carbohydrates. This allows for the burning of simple sugars in an athlete's body. Electrolytes are a category of their own because they are helpful to an athlete all of the time, whether energy storage or energy burning is needed.
When humans consume plants, the carbohydrates, lipids, and proteins are broken down through two forms of cellular respiration. The two processes of cellular respiration displayed in humans are anaerobic and aerobic. The deciding process used depends on the presence of oxygen. Cellular respiration converts the material into a useable energy called ATP. ATP is the energy form that cells can use to perform their various functions, and it can also be stored for later use.
Carbohydrates are the main source of glucose, which is a major fuel for all of the body's cells and the only source of energy for the brain and red cells. Except for fiber, which cannot be digested, both simple and complex carbohydrates are converted into glucose. The glucose is then either used directly to provide energy for the body, or stored in the liver for future use. When a person consumes more calories than the body is using, a portion of the carbohydrates consumed may also be stored in the body as fat.