Question No:1

The process of exchange of O₂ from the atmosphere with CO₂ produced by the cell is called

[A] cellular respiration
[B] breathing
[C] ventilation
[D] perfusion



Question No:2

The harmful gas produced by catabolic reaction in our body is

[A] oxygen
[B] carbon dioxide
[C] phosphine
[D] ozone



Question No:3

Oxygen (O₂) is utilized by the organisms to ______ break down nutrient molecules like glucose and to derive energy for performing various activities.

[A] directly
[B] indirectly
[C] incompletely
[D] any of the these



Question No:4

Mechanisms of breathing vary among different groups of animals depending mainly on their _____ and ______.

[A] habitats
[B] levels of organization
[C] both (a) and (b)
[D] None



Question No:5

In which of the following, gaseous exchange between O₂ and CO₂ occurs through the entire body surface?

[A] Sponges
[B] Flatworms
[C] Coelenterates
[D] All



Question No:6

Select the total number of organism from the following which respire through their body surface.
Sycon, Spongilla, Admsia, Taenia, Laccifer, Pila, Antedon, Gorgonia, Jelly fish

[A] 4
[B] 5
[C] 6
[D] 8



Question No:7

In which of the following skin serves as an accessory organ of respiration?

[A] Rabbit
[B] Frog
[C] Lizards
[D] Birds



Question No:8

Match the following:
Animals —-Respiratory Organs
A. Earthworms — 1) Lungs
B. Aquatic arthropods/Molluscs – 2) Tracheal tubes
C. Insects – 3) Gills
D. Birds/ Reptiles/Mammals — 4) Moist cuticle
E. Fishes

[A] A-2, B and C-3, D-2, E-4
[B] A-4, B and E-3, C-2, D-1
[C] A-A B and D-3, D-1, E-2
[D] A-3, B and D-1, C-2, E-A



Question No:9

Amphibians, e.g. frogs respire through

[A] moist skin
[B] lungs
[C] Buccopharyhgeal cavity
[D] All



Question No:10

The adult frog does not respire through

[A] buccopharyngeal cavity
[B] gills
[C] skin
[D] lungs



Question No:11

Which is the correct sequence of the air passage in man?

[A] Nasal cavity —> pharynx —> trachea —> larynx —> bronchi —> bronchioles —> alveoli
[B] Nasal cavity —> pharynx —> larynx —> trachea —> bronchi —> bronchioles —> alveoli
[C] Nasal cavity -> larynx -> pharynx -> trachea -> bronchi -> bronchioles -> alveoli
[D] Nasal cavity —> larynx -> bronchi —> pharynx —> trachea —> bronchioles —> alveoli



Question No:12

In mammal, voice is produced by

[A] Bronchus
[B] Syrinx
[C] Larynx
[D] Inhalation and exhalation



Question No:13

Vocal cords occur in

[A] Pharynx
[B] Larynx
[C] Glottis
[D] Bronchial tube



Question No:14

Trachea divides into right and left primary bronchi at ______ the thoracic vertebra.

[A] 4
[B] 5
[C] 6
[D] 9



Question No:15

Opening of larynx into pharynx is guarded by

[A] Syrinx
[B] Epiglottis
[C] Tracheal valves
[D] All