Olympiad – Class VII – Science - Bio - Respiration in Organisms

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Question - 1

Identify 'X' in the given equation of aerobic respiration.

  • A Water
  • B Oxygen
  • C Ethyl alcohol
  • D Nitrogen

Question - 2

The following word equation shows a chemical process that take place in an organism Y
\(\boxed { Glucose\rightarrow Ethylalcohol+carbondioxide } \)
What is organism 'Y'?

  • A Algae
  • B Protozoan
  • C Yeast
  • D Hydra

Question - 3

What will happen when diaphragm relaxes and curves upwards?

  • A Air is forced out of the lungs
  • B The rib cage goes up and outward.
  • C The volume of the thoracic cavity increases
  • D Air pressure inside the thoracic cavity decreases.

Question - 4

The classification table given below shows how different organisms breathe

  • A Tadpole-Whale-Earthwarm
  • B Fish-Crocodile-Cockroach
  • C Frog-Shark-Toad
  • D Prawn- Grasshopper- cockroach

Question - 5

Gas 'P' diffuses from a capillary into an alveolus in the lungs. When is gas 'P' expelled out from the alveolus?

  • A During inhalation
  • B During exhalation
  • C During perspiration
  • D During inspiration

Question - 6

When we inhale, we breathe in air into the lungs. What do we breathe out when we exhale?

  • A Only oxygen gas
  • B Only hydrogen gas
  • C Air that has more oxygen than inhaled air
  • D Air that has more carbon dioxide than inhaled air.

Question - 7

What isthe function of the hair in the nose?

  • A To secrete mucus.
  • B To trap dust particles
  • C To protect the mucus glands
  • D To prevent germs from entering the lungs.

Question - 8

Identify the labelled parts P,Q and R in the figure given below.

  • A Bronchus -Bronchiole- Alveolus
  • B Trachea- Alveolus -Bronchus
  • C Bronchus- Bronchiole -Diaphragm
  • D Trachea-Alveolus- Diaphragm

Question - 9

Which of these are the organs of human respiratory system?

  • A Trachea
  • B Alveolus
  • C Bronchus
  • D All of these

Question - 10

What will happen when the thin rubber sheet is pushed upwards?

  • A Air is pulled in
  • B Air is forced out
  • C Air pressure in the bell jar increases
  • D No change