Match the following columns and select the correct option:- Column-I Column-II (a) Pneumotaxic centre (i) Alveoli (b) O 2 Dissociation curve (ii) Pons region of the brain (c) Carbonic anhydrase (iii) Haemoglobin (d) Primary site of exchange of gases (iv) RBC

( a ) - ( ii ) , ( b ) - ( iii ) , ( c ) - ( iv ) , ( d ) - ( i )

( a ) - ( i ) , ( b ) - ( iii ) , ( c ) - ( ii ) , ( d ) - ( iv )

( a ) - ( iii ) , ( b ) - ( ii ) , ( c ) - ( iv ) , ( d ) - ( i )

( a ) - ( iv ) , ( b ) - ( i ) , ( c ) - ( iii ) , ( d ) - ( ii )

The partial pressures (in mmHg ) of oxygen O 2 and carbon dioxide CO 2 at alveoli (the site of diffusion) are:

p O 2 = 159 and p C O 2 = 0 . 3

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

High p O 2 , low p C O 2 , less H + , lower temperature

Low p O 2 , high p C O 2 , more H + , higher temperature

High p O 2 , high p C O 2 , less H + , higher temperature

Low p O 2 , low p C O 2 , more H + , higher temperature

E M B I B E

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 6

MEDIUM

NEET

IMPORTANT

Earn 100

Which of the following is an incorrect statement with respect to lungs?

50% studentsanswered this correctly

Important Questions on Breathing and Respiration

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 7

{CO}_{2}

is dissociated from carbaminohaemoglobin when:

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 8

The urge to inhale in humans results from

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 9

The role played by one of the following options given below, is insignificant in the regulation of respiratory rhythm:

EASY

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IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 10

Carbonic anhydrase helps in the formation of

EASY

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 11

Identify the wrong statement:

MEDIUM

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IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 12

Which of the following is the correct sequence of respiration in our body?
(i) Exchange of gases between deoxygenated blood and alveoli.
(ii) Utilization of oxygen by the cells.
(iii) Exchange of gases between oxygenated blood and tissue.
(iv) Inhalation of air.

MEDIUM

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IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 13

Which of the following events are seen when a person moves to high altitude?
(i) Breathing rate increases.
(ii) Binding capacity of haemoglobin with oxygen decreases.
(iii) The

{pO}_{2}

in alveolar air is reduced, so the diffusion of oxygen from the alveolar air into blood also reduces.
(iv) RBC production increases in the body to compensate for low oxygen availability.

MEDIUM

NEET

IMPORTANT

Biology Crash Course NEET>Chapter 17 - Breathing and Respiration>Level 2>Q 14

Fill up the blanks in the following paragraph by selecting the correct option.
The movement of air into and out of the lungs is carried out by creating a ____(i)____ between the lungs and the atmosphere. Inspiration can occur if intra-pulmonary pressure is ____(ii)____ than the atmospheric pressure. Expiration takes place when the intra-pulmonary pressure is ____(iii)____ than the atmospheric pressure. Inspiration is initiated by the ____(iv)____ of diaphragm which ____(v)____ the volume of thoracic chamber in the antero- posterior axis.

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