Advertisements
Advertisements
प्रश्न
State the utility of oxygen for respiration in living organisms
Advertisements
उत्तर
Respiration in living organisms :
Respiration: It is a process whereby living things
- Use oxygen from their air to oxidize food substances mainly glucose, in their body cells.
- Release energy in the form of heat.
- Carbon dioxide and water vapour are also produced and released in the exhaled air
\[\ce{Glucose + \underset{\text{[in air]}}{Oxygen} -> \underset{\text{Exhaled air}}{Carbon dioxide + Water vapour+ Energy[heat]}}\]
Process:
- Inhaled air— Oxygen from inhaled air dissolves in the blood stream in the lungs. It is carried to the cells where the food materials i.e. glucose is oxidized by the oxygen.
- Exhaled air— Carbon dioxide, water vapour, and heat energy diffuse out of the lungs as exhaled air.
- The energy liberated— The energy liberated is utilized for metabolic activities and maintains body temperature.
संबंधित प्रश्न
Complete and balance the following equation
CaO + H2O →
Define the following:
Combustion.
Fill in the blanks
Oxygen is used in ___________the food to get _______.
Match the statements in List 1 with the correct answers in List 2
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Water vapour |
| 2 | The component of air which supports combustion | B | Respiration |
| 3 | The inert component in the air slightly soluble in water | C | Rare gases |
| 4 | The component of air which minimizes the rate of evaporation | D | Sulphur dioxide |
| 5 | The process which involves oxidation of food substance in living organisms | E | Helium |
| 6 | The component of air which finds application in observation balloons | F | Carbon dioxide |
| 7 | The process which involves oxidation of substances, liberating heat and light energy | G | Combustion |
| 8 | The component of air which is heavier than air and fairly soluble in water | H | Nitrogen |
| 9 | The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates | I | Photosynthesis |
| 10 | The component of air which is lighter than air and less than 1% in air | J | Oxygen |
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
What is the percentage of oxygen in air?
Which gas in the atmosphere is essential for respiration?
The Scottish chemist ______ discovered carbon dioxide is present in air.
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Mountaineers carry oxygen ______ with them, while climbing high mountains.
