Class 7 Respiration in Organisms Extra Questions

Class 7 Respiration in Organisms Extra Questions

Respiration in Organisms Fill in the blanks:-


[1] The process of breaking down food to release energy is called ………. [respiration.]

[2] Frogs breathe through their lungs and ………..[skin]

[3] In insects, gas exchange takes place through ………[spiracles]

[4] Plants exchange gases through their ………..[stomata.]

[5] Inhaled air contains a high concentration of …[oxygen]

[6] Anaerobic respiration produces ………….& ……[carbon dioxide and alcohol]

[7] The act of …….involves both inhalation and exhalation.[ breathing]

[8] In humans, the …………are the main organ of respiration.[ lungs]

[9] An organ that lies at the bottom of the chest cavity is the ……..[diaphragm]


Respiration in Organisms Question and Answers


[Q] What are the main organs of the respiratory system?

The respiratory system consists of the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles.


[Q] Define Stomata?

The stomata are tiny pores found on the underside of a leaf. They contribute to the exchange of oxygen and carbon dioxide in a leaf as well as the loss of water through transpiration.


[Q] What is the function of the Diaphragm?

A diaphragm is an elastic membrane at the bottom of the chest cavity that can stretch like a balloon and pull-down making them larger while inhalation.


[Q] Explain the breathing process?

As you breathe in, or inhale, your diaphragm contracts and moves downward. As a result, the space in your chest cavity increases, and your lungs expand into it. The muscles between your ribs are also responsible for enlarging your chest. During inhalation, the diaphragm contracts and pulls your rib cage upward and outward. This increases the volume of the lung cavity. During exhalation, the diaphragm is relaxed which decreases the volume of the lung cavity.


[Q] Define Aerobic Respiration?

It takes place in the presence of oxygen. Glucose is completely oxidised to carbon dioxide and water. A large amount of energy is released. The end products of this reaction are carbon dioxide and water. This process is carried out by plants, animals, and humans.


[Q] Define Anaerobic Respiration?

The following reaction occurs in the absence of oxygen: Glucose is incompletely oxidized into Alcohol and carbon dioxide. The energy released is minimal Carbon dioxide and coal or lactic acid are the products of this reaction, which is carried out by bacteria and yeast.


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