Olympiad Test Level 1: Our Body and Health- 2 - Class 4 MCQ

Sphygmomanometer is an equipment which is used to measure blood pressure.

Vitamins and minerals are required to protect our body from diseases and keep it fit.

The messages from the sense organs are carried by the sensory nerves.

Explanation:
The food components that are needed in small quantities are vitamins.
- Proteins: Proteins are macronutrients that are needed in relatively large quantities by the body. They are essential for growth, repair, and maintenance of body tissues.
- Vitamins: Vitamins are micronutrients that are needed in small quantities for various physiological processes in the body. They play a crucial role in maintaining overall health and preventing various diseases.
- Fats: Fats are also macronutrients that provide energy to the body. They are needed in moderate quantities for normal body functions and to absorb certain vitamins.
- Carbohydrates: Carbohydrates are the main source of energy for the body. They are needed in relatively large quantities and should form a significant part of a balanced diet.
In conclusion, among the given options, vitamins are the food component that is needed in small quantities.

Ears are the organs that help us in hearing different sounds in the surroundings.

The muscular system’s main function is to allow movement.

Cardiologist treats cardiovascular system, nephrologist treats kidney diseases, dermatologist treats skin diseases and psychiatrist treats mental health conditions.

Kidney filters the waste products present in our body, which are added to the urine and removed from the body.

The image shows the lungs, which are the primary organs of the respiratory system responsible for gas exchange, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled.

The organ shown in the picture is Stomach which helps in the digestion of food.

Formation of Hair and Nails
Hair and nails are formed through a complex process involving various nutrients. The following points explain how proteins help in the formation of hair and nails:
Proteins:
- Hair and nails are primarily made up of a protein called keratin.
- Proteins are composed of amino acids, which are the building blocks of keratin.
- The body needs an adequate supply of proteins to produce keratin and promote hair and nail growth.
- Proteins play a crucial role in the synthesis and maintenance of hair and nails.
- They provide strength, structure, and elasticity to hair and nails.
- Adequate protein intake is essential for healthy hair and nail growth.
In conclusion, proteins are the key nutrient that helps in the formation of hair and nails. Other nutrients like carbohydrates, fats, and vitamins also play a role in overall hair and nail health, but proteins are specifically responsible for their formation.

The gland shown is liver and it is part of the digestive system.

Both coughing and sneezing are mechanisms of respiratory system.

Neurologist treats conditions of nerves and spine, pulmonologist treats problems of breathing organs, psychiatrist treats mental health and nephrologists treats conditions of kidney.

The organs which are located outside the body. For example:-Ears, eyes and nose.