Question

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Answer 1

7. Answer

1. Option- (b) Mitochondria.

The break down of pyruvate to give carbon dioxide, energy and water takes place in the presence of oxygen and is termed as aerobic respiration. This process takes place in the mitochondria of a cell.

2. Option-(c) Carbon Dioxide+ water+ Energy.

3.Option-(c) haemoglobin.

4.Tracheal cartilage.

5.How alveoli work

i)moving air in and out of your lungs (ventilation)

ii)oxygen-carbon dioxide exchange (diffusion).

iii)pumping blood through your lungs (perfusion).

6.respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction. In contrast, exhalation (breathing out) is usually a passive process.

There are two types of Respiration:

There are two types of Respiration:Aerobic Respiration — Takes place in the presence of oxygen.

There are two types of Respiration:Aerobic Respiration — Takes place in the presence of oxygen.Anaerobic Respiration –Takes place in the absence of oxygen.

8.i) Glucose is the most important source of energy for all living things. The food we eat is broken down into carbohydrates, the most important of which is glucose. To provide energy to the body, glucose is oxidised.

ii) ATP is the abbreviated form of Adenosine triphosphate. This molecule is considered as the main source of energy reserve which is present in all the living organisms. The bond between the three phosphate molecules is very strong and large amount of energy is stored in this bond. The energy can be used to perform various reactions that occur in the cell.

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Answer 2

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