 Allergies [27]
Allergy is a disorder of the immune system often also referred to as atopy.
Antidepressants [29]
An antidepressant is a psychiatric medication used to alleviate mood disorders, such as major depression and dysthymia.
Arthritis [12]
Arthritis is a group of conditions involving damage to the joints of the body.
Cancer [26]
Cancer is a class of diseases in which a group of cells display uncontrolled growth
Cardio & Blood [1]
Risk factors for heart disease: infections
Cholesterol [2]
A fat-like substance called a lipid. It is used to build cell membranes, hormones and bile acids
Diabetes [23]
The inability of the body to produce, or the inability to metabolize, the human hormone insulin; Diabetes insipidus, usually a disorder of the ...
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Epilepsy is a common chronic neurological disorder characterized by recurrent unprovoked seizures
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The digestive tract is the system of organs within multicellular animals that takes in food...
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The infant, child or young person?s current health condition
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Herbal tea, herbal medicine
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Hormones - Proteins produced by organs of the body that trigger activity in other locations.
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For men on fitness, health, sex, caree
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Pain management is the medical discipline concerned with the relief of pain.
Skin care [15]
The skin is the outer covering of the body
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Loss of body weight by dieting or due to various easting disorders or medical conditions.
Women's Health [20]
Find information on women's health issues, and lifestyle at the Women's Health
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Bioenergetics and metabolism BIOENERGETICS AND METABOLISM
Summary of main points.
• Bioenergetics is the study of energetic events occurring in living organisms; it covers energy (food) intake and energy expenditure.
• Fat is the most energy dense nutrient, containing more than twice the energy of carbohydrate or protein. Energy expenditure is made up of resting metabolic rate, the thermic effect of food and the energy cost of physical activity.
• Bigger people have a higher metabolic rate mainly because of a greater resting metabolic rate from a higher fat-free mass.
• Even very small females require an energy intake of around 1200kcal per day to maintain energy balance.
The living cells of the human body are in a constant state of molecular activity, where they are used, degraded and synthesised to maintain life. These actions require energy which is defined as 'the capacity to perform work. This definition does not, however, describe the many biological functions that either require or liberate energy in the body.
Understanding what energy is and how the body acquires, converts, stores, and utilises it is the key to understanding how humans can perform activities. It also provides the basis for understanding how fat is used as an energy source, or substrate, and how this may be optimised for best maintenance of body fat levels. The study of energetic events occurring in living organisms, which commenced in the 18th century, is called bioenergetics.
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