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 )

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The chemosensitive area of the brain is stimulated by

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Important Questions on Breathing and Exchange of Gases

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Describe the regulation of respiration in humans.

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

In man, pneumotaxic center lies in

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Match the following columns and select the correct option:-

Column-I		Column-II
(a)	Pneumotaxic centre	(i)	Alveoli
(b)	O₂ Dissociation curve	(ii)	Pons region of the brain
(c)	Carbonic anhydrase	(iii)	Haemoglobin
(d)	Primary site of exchange of gases	(iv)	RBC

EASY

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

How is respiratory movements regulated in man?

HARD

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Which of the following shows chemoreceptors for respiration?

EASY

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

State the significance of respiration.

HARD

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?

EASY

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Rate of breathing is controlled mainly by

EASY

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

The respiratory centre in brain is stimulated by

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Read the given statements and select the correct option.
Statement 1: Rate of breathing is regulated by respiratory centres present in the medulla oblongata.
Statement 2: Changes in the CO₂ level of the arterial blood control the rate of breathing.

HARD

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit demands of the body. For it we have
Respiratory rhythm centre in medulla – R
Pneumotaxic centre in pons – PT
Chemosensitive area in medulla –

C_{1}

Peripheral chemoreceptors in aortic arch and carotid artery-

C_{2}

Find out the correct path for the regulation of respiration.

EASY

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Complete the following sentence by selecting the correct option.
The breathing rhythm is generated in the _____(i)_____ and is influenced by variation in levels of _____(ii)_____ in the blood.

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

The apneustic centre of pons is concerned with which of the following actions?

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

The respiratory centre in the brain is stimulated by

EASY

Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

The rate of breathing is controlled by:

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Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration

Which of the following can activate the chemosensitive area situated adjacent to the rhythm centre?