krit.club logo

Food, Health, and Digestion - Nutrients and a Balanced Diet

Grade 4CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

•

Nutrients are chemical substances found in food that provide energy, help in growth, and protect our body from diseases.

•

Carbohydrates are 'energy-giving foods' containing sugar and starch. They provide the body with the energy needed to perform work.

•

Proteins are 'body-building foods' necessary for the growth and repair of body tissues and muscles.

•

Fats provide more energy than carbohydrates and help in keeping the body warm. Excess fat is stored in the body for later use.

•

Vitamins and Minerals are 'protective foods' required in small quantities to keep us healthy. For example, Calcium (CaCa) is needed for strong bones and Iron (FeFe) is needed for blood formation.

•

Roughage is the fiber present in food that cannot be digested but helps in the removal of waste from the body.

•

Water (H2OH_2O) is essential for digestion, absorption of nutrients, and maintaining body temperature through sweating.

•

A Balanced Diet is a diet that contains the correct proportions of all the five nutrients along with sufficient water (H2OH_2O) and roughage.

📐Formulae

Total Diet=Carbohydrates+Proteins+Fats+Vitamins+Minerals+Roughage+H2O\text{Total Diet} = \text{Carbohydrates} + \text{Proteins} + \text{Fats} + \text{Vitamins} + \text{Minerals} + \text{Roughage} + H_2O

Energy Output≈Energy Input (from Carbohydrates and Fats)\text{Energy Output} \approx \text{Energy Input (from Carbohydrates and Fats)}

Growth/Repair∝Protein Intake\text{Growth/Repair} \propto \text{Protein Intake}

💡Examples

Problem 1:

A child is suffering from weak bones. Which mineral should be added to their diet, and what is its chemical notation?

Solution:

Calcium (CaCa)

Explanation:

Calcium is a vital mineral for the development and maintenance of strong bones and teeth. Milk and dairy products are rich sources of CaCa.

Problem 2:

Why do athletes consume high amounts of glucose (a type of carbohydrate) before a race?

Solution:

For immediate energy.

Explanation:

Carbohydrates like glucose are broken down quickly to provide the energy needed for physical activities. The energy stored in carbohydrates is used to perform work.

Problem 3:

What happens if we do not include enough H2OH_2O and roughage in our daily intake?

Solution:

Difficulty in digestion and constipation.

Explanation:

Water (H2OH_2O) helps in the smooth movement of food through the digestive system, and roughage adds bulk to the food, facilitating the removal of undigested waste.