Role of energy in the body
Role of energy in the body
There are six main forms of energy-
Chemicals
Heat
Electrical
Light
Nuclear
Sound
Energy can be measured or expressed by joules or unites of hear (kilocalorie).
1 kilocalorie= 4.184 kilojoules.
Sources of energy-
Protein 1g= 4 kcal
Carbohydrate 1g= 4 kcal
Fats 1g= 9 kcal
In our bodies we need energy we need energy for everything we do, move our muscles, talk etc. Without energy we wouldn’t be able to do anything, energy is needed for our bodies to function. Chemical reactions in our body extract energy from the food we eat. Doing everything to body needs to stay alive and grow includes, pumping ions across membranes, making hormones, making new cells, neural function, contracting muscles, replacing damaged or worn out components, absorbing nutrients, excreting wastes and pumping blood.
Supplying enough energy to support the many functions of the body at work is food. This energy comes from the fats, carbohydrates, and proteins in the food you eat. Of the three, fat is the most concentrated source of energy because it takes more than twice as much energy for a given weight as protein or carbohydrate. The energy requirement for a person is divided into two parts: basal metabolic requirements and energy required for activity. Basal metabolic rate is the heat eliminated from the body at rest when temperature is normal. An average person requires 2000-2400 Calories per day while a large man doing heavy work may require up to 6000 Calories per day. The three main classes of food provide the following amount of energy: carbohydrates and proteins provide about 4 Calories per gram; fats provide about 9 Calories per grams.
Metabolism-
Hormones control the direction and rate of metabolism. The rate of metabolism when a person is at rest is called basal metabolic rate. It is the measure of heat produced by metabolism. The molecules of glucose and fatty acids are in the process of metabolism.
There are six main forms of energy-
Chemicals
Heat
Electrical
Light
Nuclear
Sound
Energy can be measured or expressed by joules or unites of hear (kilocalorie).
1 kilocalorie= 4.184 kilojoules.
Sources of energy-
Protein 1g= 4 kcal
Carbohydrate 1g= 4 kcal
Fats 1g= 9 kcal
In our bodies we need energy we need energy for everything we do, move our muscles, talk etc. Without energy we wouldn’t be able to do anything, energy is needed for our bodies to function. Chemical reactions in our body extract energy from the food we eat. Doing everything to body needs to stay alive and grow includes, pumping ions across membranes, making hormones, making new cells, neural function, contracting muscles, replacing damaged or worn out components, absorbing nutrients, excreting wastes and pumping blood.
Supplying enough energy to support the many functions of the body at work is food. This energy comes from the fats, carbohydrates, and proteins in the food you eat. Of the three, fat is the most concentrated source of energy because it takes more than twice as much energy for a given weight as protein or carbohydrate. The energy requirement for a person is divided into two parts: basal metabolic requirements and energy required for activity. Basal metabolic rate is the heat eliminated from the body at rest when temperature is normal. An average person requires 2000-2400 Calories per day while a large man doing heavy work may require up to 6000 Calories per day. The three main classes of food provide the following amount of energy: carbohydrates and proteins provide about 4 Calories per gram; fats provide about 9 Calories per grams.
Metabolism-
Hormones control the direction and rate of metabolism. The rate of metabolism when a person is at rest is called basal metabolic rate. It is the measure of heat produced by metabolism. The molecules of glucose and fatty acids are in the process of metabolism.