EASY
Earn 100

When CO2 concentration in blood increases breathing becomes

72.97% studentsanswered this correctly

Important Questions on Breathing and Exchange of Gases

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

Select the correct events that occur during inspiration.

(a) Contraction of diaphragm
(b) Contraction of external intercostal muscles
(c) Pulmonary volume decreases
(d) Intrapulmonary pressure increases

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?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
In man, pneumotaxic center lies in
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
How is respiratory movements regulated in man?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
Describe the regulation of respiration in humans.
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
Which of the following shows chemoreceptors for respiration?
MEDIUM
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
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
When CO2 concentration in blood increases breathing becomes
HARD
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
Chemosensitive area of respiratory centre in medulla is affected by
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 – C1
Peripheral chemoreceptors in aortic arch and carotid artery- C2
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.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
The respiratory centre in brain is stimulated by
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
Read the following four statements carefully.
(ij Ventral respiratory group of neurons of medulla oblongata can cause both inspiration and expiration.
(ii) The part of the respiratory system starting with the external nostrils up to the terminal bronchioles constitutes the respiratory or exchange part of the respiratory system.
(iii) During swallowing epiglottis can be covered by a thin elastic cartilaginous flap called glottis to prevent the entry of food into the larynx.
(iv) Binding of oxygen with haemoglobin is primarily related to partial pressure of O2 .
Which of the above two statements are correct?
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
The urge to inhale in humans results from
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
Pneumotoxic centre which can moderate the functions of the respiratory rhythm centre is present at
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
The rate of breathing is controlled by:
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present in
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
Complete the following sentence by selecting the correct option.
Receptors associated with aortic arch and carotid artery can recognise changes in ____(i)____ and ____(ii)____ concentration and send necessary signals to ____(iii)____ for remedial actions.
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Regulation of Respiration
How is respiration regulated?