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Question-1
Write the correct sequence of the pathway through which air travels after entering the body.
A. Larynx, pharynx, trachea bronchioles
B. Pharynx, larynx, trachea, bronchioles
C. Pharynx, larynx, bronchioles, trachea
D. Pharynx, trachea, larynx, bronchioles

(A) A	(B) B
(C) C	(D) D

Question-2 When you breath in air, you bring oxygen into your lungs and blow out_________________.

(A) carbon dioxide.	(B)carbon monoxide.
(C)oxygen.	(D)hydrogen.

Question-3 When we breathe in, we inhale many gases, including oxygen. What happens to the gases that the body can't use?

(A) They are exhaled.	(B)They are changed into oxygen by the lungs.
(C)They circulate through the body and are disposed of later.	(D)They are absorbed into the digestive system and used to create energy.

Question-4 Oxygen moves from the lungs into the bloodstream through ...

(A) nerve fibres	(B)a large artery in the heart
(C)small blood vessels in the lungs	(D)a tube in the lungs called the jugular vein

Question-5
Which process does not occur in the nasal cavity?

(A) Trapping of large foreign bodies	(B) Exchange of gases
(C) Humidification of inhaled air	(D) Warming of inhaled air

Question-6 The tiny hairs that keep mucus and dirt out of your lungs are called _____________.

(A) lung hairs.	(B)stubble.
(C)Bronchioles	(D)Cilia

Question-7 The trachea is also called the ________________.

(A) lungs.	(B)Diaphragm.
(C)Windpipe	(D)Bronchus.

Question-8
What happens to the windpipe, or trachea, before it reaches the lungs?

(A) It branches in two directions.	(B) It branches in three directions.
(C) It vibrates and creates sounds.	(D) It closes up so that no oxygen can escape.

Question-9 What is the name of the tiny air sacs in the lungs?

(A) Bronchioles.	(B) Ravioli.
(C) Alveoli.	(D) Bronx.

Question-10
Exchange of air occurs in _______ which are also known as 'air sacs'

(A) Bronchi	(B) Alveoli
(C) Bronchioles	(D) Alveolar ducts

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Std 9

ICSE/ISC

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