Deb wrote at 2014-05-23 12:28:12
Energy is produced in the body through a process called respiration, where food substances are broken down in presence of oxygen.Energy is produced in the body through a process called respiration, where food substances are broken down in presence of oxygen.This process is referred to as aerobic respiration.
It is also possible for food substance to be broken down in absent of oxygen. this is referred to as anaerobic respiration.
The energy is combined with Adenosine diphosphate(ADP) with a phosphate molecule to form adenosine triphosphate
ATP is a high energy molecule that stores energy and avails it to the cell. ur body also requires energy for
performing various functions. This energy
mainly comes from carbohydrates and fats
that we take as food. Carbohydrates are
decomposed into glucose or its derivatives in
the stomach. Glucose is soluble in blood. It is
transported by the blood cells to various
parts of the body where it reacts with oxygen
in a series of steps producing carbon dioxide
(CO2), water (H2O) and energy.
C6H12O6 +6O2 ------------6CO2 +6H2O
This process is very much similar to the
process of burning. However, this process
takes place inside our body quite slowly and
at the much lower temperature. This slow
combustion of food material takes place at
the body temperature because of the
catalytic action of enzymes. This slow combustion of food in the cells resulting in
the release of energy is called respiration.
Carbon dioxide and water, which are formed
during respiration, are expelled through
various organs of the body. The energy
released in respiration fulfils the energy
needs of the body.
Although respiration is similar to combustion
in respect of the products formed and the
energy released yet it differs from it in many
The process of manufacturing energy in the human body is termed metabolism.
Metabolism is not the result of a single process but is the culmination of a series of processes ;Eating of foods containing different nutrients.
Digestion of foods into smaller macro-nutrients such as glucose, fats and amino acids.
Absorption of the macro-nutrients from the stomach into blood stream.
Transport of the nutrients to the cells
Further chemical breakdown (oxidation) of fat and glucose to produce energy in two forms; heat and ATP.