Class 10 Biology Competitive Exam MCQs – Practice Test 21 (Chapter 3)

Gaseous Exchange MCQs with Answers PDF Download – Test 21

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Gaseous Exchange MCQs – Practice Test 21 PDF Download

MCQ 101: In the air passageway, the nasal cavity opens into a muscular passage which is called:

nostrils
pharynx
trachea
glottis

MCQ 102: Nostril has mucous which is responsible for:

filtering of air
cleaning of air
moisten the air
clear the air

MCQ 103: Which of the following is a narrow opening at the floor of the pharynx which leads into larynx?

epiglottis
glottis
oral cavity
Oesophagus

MCQ 104: The powerful poison, widely used as an insecticide:

nicotine
glucagon
nicotinamide
histamine

MCQ 105: The respiratory disorder asthma leads to:

more mucous production
lungs infection
destruction of alveoli walls
inflammation of bronchi

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