Tag: nutrition and its need

Nutrients are essential to survive and grow for an organism. A balanced diet provides the body nutrients it needs to function properly. Hence, a balanced diet is a good source of nutrients.

The process of nourishing or being nourished, especially the process by which a living organism assimilates food and uses it for growth and for replacement of tissues

•  The four major structural elements in the human body by weight  (oxygen, hydrogen, carbon, and nitrogen), are usually not included in lists of major nutrient minerals.
• As a group, minerals are one of the four groups of essential nutrients, the others of which are vitamins, essential fatty acids, and essential amino acids
• The five major minerals in the human body are calcium, phosphorus, potassium, sodium, and magnesium All of the remaining elements in a human body are called "trace elements". The trace elements are sulfur, iron, chlorine, cobalt, copper, zinc, manganese, molybdenum, iodine and selenium. Hence, silicon is not a major nutrient for the body.
  

• Physiological calories obtained from different food substances are - Carbohydrates give 4.0Kcal/g, Proteins give 4.0Kcal/g while fats give 9.0Kcal/g.
• So, energy from 5g sugar = 5 x 4Kcal = 20Kcal
• Energy from 4g albumin = 4 x 4Kcal = 16Kcal
• energy from 10g+2g fat = 12 x 9Kcal = 108Kcal
• lignin cannot be digested by humans because of the absence of digestive enzyme for lignin so no calories will be obtained from them. Ruminants are capable of digesting lignin.
• Adding all the above-obtained values we get 144Kcal.

So, the correct answer is '144'.

The human body can last weeks without food, but only days without water. The body is made up of 50 to 75 per cent water. Water forms the basis of blood, digestive juices, urine and perspiration, and is contained in lean muscle, fat and bones. It helps to maintain the temperature of the body.

Chloroplasts are green because they contain the green pigment chlorophyll in their thylakoid membranes. Chlorophyll is a pigment that absorbs red and blue light. So plants are green because chlorophyll reflects green light.