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NEET 2020
Exam
NEET
Year
2020
Subject
Zoology
Chapter
Breathing and Exchange of Gases

NEET 2020 · Zoology · Breathing and Exchange of Gases

Match the following columns and select the correct option:-...

Match the following columns and select the correct option:-

Column-I Column-II
(a) Pneumotaxic centre (i) Alveoli
(b) O2{O}_{2} Dissociation curve (ii) Pons region of brain
(c) Carbonic anhydrase (iii) Haemoglobin
(d) Primary site of exchange of gases (iv) R.B.C.R . B . C .

Options

  1. A(a)−(i),(b)−(iii),(c)−(ii),(d)−(iv)( a ) - ( i ) , ( b ) - ( iii ) , ( c ) - ( ii ) , ( d ) - ( iv )
  2. B(a)−(ii),(b)−(iii),(c)−(iv),(d)−(i)( a ) - ( ii ) , ( b ) - ( iii ) , ( c ) - ( iv ) , ( d ) - ( i )
  3. C(a)−(iii),(b)−(ii),(c)−(iv),(d)−(i)( a ) - ( iii ) , ( b ) - ( ii ) , ( c ) - ( iv ) , ( d ) - ( i )
  4. D(a)−(iv),(b)−(i),(c)−(iii),(d)−(ii)( a ) - ( iv ) , ( b ) - ( i ) , ( c ) - ( iii ) , ( d ) - ( ii )

Correct answer

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

Step-by-step solution

The centres in pons influence the rhythmicity centre of the medulla. Pons has pneumotaxic centre and apneustic centre. The pneumotaxic centre inhibits the inspiratory neurons and facilitates expiration as a result the breathing rate becomes increased.

Alveoli is the primary site of the lungs where the exchange of gases takes place between lungs and blood capillaries.

RBCRBC has the presence of a carbonic anhydrase enzyme that helps in bidirectional reaction, i.e. formation and dissociation of carbonic acid.

The oxygen dissociation curve explains the saturation of O2{O}_{2} with haemoglobin.

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