Exam Question for Class 11 Biology Chapter 17 Breathing and Exchange of Gases
Question. Which of the following has no specialized respiratory structures ?
Question. Lungs are present in
(b) pleural cavity
(c) pericardial cavity
(d) thoracic cavity
Question. Intercostal muscles are found attached with
Question. The nose produces ____________ to put moisture in the air and catch dust and bacteria.
Question. The path that leads from the throat to the lungs is known as
Assertion/Reason Type Questions
In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.
Question. Assertion: If two men, expire the same volume of air after normal inspiration, they have the same expiratiory capcity.
Reason: Expirtory capacity includes tidal valume and inspiratory reserve volume.
Question. Assertion: The abdominal muscles are primarily involved in generating pressure gradient between the lungs and the atmosphere.
Reason: The strength of inspiration and expiration can be increased by additional muscles in diaphragm and intercostal muscles.
Matching Type Questions
Question. Match the column I (Animals) with column II (Mode of respiration) and choose the correct option.
|Column – I |
|Column – II|
(Mode of respiration)
|A. Earthworm||I. Pulmonary|
|B. Human||II. Branchial|
|C. Prawn||III. Tracheal|
|D. Insects||IV. Cutaneous|
(a) A – I; B – II; C – III; D – IV
(b) A – IV; B – II; C – I; D – III
(c) A – IV; B – I; C – II; D – III
(d) A – III; B – II; C – IV; D – I
Question. Listed below are four respiratory capacities (A-D) in column I and four jumbled respiratory volume of a normal human adult in column II.
|Column -I |
|A. Residual volume||I. 2500 mL|
|B. Vital capacity||II. 3500 mL|
|C. Inspiratory reserve volume||III. 1200 mL|
|D. Inspiratory capacity||IV. 4500 mL|
Which one of the following is the correct matching of two capacities and volume?
(a) A – I; B – II; C – III; D – IV.
(b) A – IV; B – III; C – I; D – II.
(c) A – II; B – III; C – IV; D – I.
(d) A – III; B – IV; C – I; D – II.
Question. Which one of the following four organs of respiratory system is correctly matched with its characteristics?
A. Bronchi – Two branches of the trachea that brings air into the lungs.
B. Trachea – Small flap that prevents food from entering
C. Diaphragm – Dome shaped muscle that pushes on the lungs during exhalation.
D. Alveoli – Pair of organs that inflate as you inhale and deflate as you exhale.
(a) A and B only
(b) C and D only
(c) A and C only
(d) B and D only
Critical Thinking Type Questions
Question. About 70% of CO2 is transported as
(a) carbonic acid
(d) carbamino compounds
Question. Even when there is no air in it, human trachea does not collapse due to presence of
(a) bony rings
(b) turgid pressure
(c) chitinous rings
(d) cartilaginous rings
Question. During inspiration in mammals, the diaphragm becomes
(a) dome shaped
(b) raised highly
Question. Combining of haemoglobin with O2 in lungs can be promoted by
(a) decreasing CO2 concentration in blood.
(b) decreasing O2 concentration in blood.
(c) increasing CO2 concentration in blood.
(d) introducing CO2 into blood.
Question. What would happen if human blood becomes acidic (low pH)?
(a) Oxygen carying capacity of haemoglobin increases.
(b) Oxygen carrying capacity of haemoglobin decreases.
(c) RBCs count increases.
(d) RBCs count decreases.
Question. Low oxygen tension in the blood causes
Question. Which of the following are the stages of respiration in correct order?
A – Gaseous transport
B – Cellular respiration
C – Tissue respiration
D – Breathing
(a) A – D – C – B
(b) D – A – C – B
(c) D – A – B – C
(d) D – C – B – A
Question. Functional residual capacity in human is the amount of air
(a) that can be filled in lungs by forceful inspiration.
(b) that can be breathed out after forceful expiration.
(c) that remains in the lungs after normal expiration.
(d) that remains in the lungs after forceful expiration.
Question. Number of RBCs per unit volume of blood is likely to be higher in a person living at high altitudes, because
(a) air is clean and unpolluted.
(b) more sunshine is available.
(c) air is less dense.
(d) vegetation gives out more O2.