Neet Questions Breathing And Exchange Of Gases

Get access to the most important set of questions on Chapter Breathing and the Exchange of Gases for NEET. Check out the list of questions below that have already been featured in the NEET question papers from previous years.

Important NEET Questions on Class 11 Chapter 17: Breathing and Exchange of Gases

1. The alveoli, which are air-filled sacs, make up the lungs and they do not collapse even after forceful expiration due to [NEET 2017].

Expiratory Reserve Volume

B. Inspiratory Reserve Volume

C. Residual Volume

D. Tidal Volume

Some air always remains in the lungs which cannot be expelled, and the lungs do not collapse between breaths (NEET – II 2016)

A. There is a positive intrapleural pressure

B. There is negative intrapleural pressure pulling the lung walls inward

C. There is a decrease in pressure in the lungs

The pressure in the lungs is higher than atmospheric pressure.

Answer: Chronic Obstructive Pulmonary Disease (COPD)

NEET-I 2016

A. Respiratory Alkalosis

B. Respiratory Acidosis

C. Asthma

D. Emphysema

Approximately 70% of Carbon Dioxide Absorbed by the Blood is Transported to the Lungs (2014)

A. Carbamino Hemoglobin

B. by binding to RBC

C. in the form of dissolved gas molecules

D. as bicarbonate ions

People who migrated to an area adjoining Rohtang Pass in 2012

A. are not physically capable of playing sports such as football.

B. Have more RBCs and their hemoglobin have a lower binding affinity to O2

C. Have the usual RBC count, but their hemoglobin has very high binding affinity to O2.

D. suffer from altitude sickness, with symptoms such as nausea, fatigue, etc.

A large proportion of oxygen taken up by the body tissues remains unused in the human blood, according to O2 (2011).

A. helps in releasing more O2 to the epithelial tissues

B. is sufficient to maintain oxyhemoglobin saturation at 96%

C. raises the pCO2 of blood to 75 mm of Hg

D. serves as a reserve during muscular exercise.

The majority of carbon dioxide (CO2) released from body tissues into the blood is in the form of

(Mains 2011)

Mains 2011

A. Carbaminohemoglobin in RBCs

70% carbamino-hemoglobin and 30% bicarbonate

C. Free CO2 in Blood Plasma

D. Bicarbonate in Blood Plasma and RBCs

RBCs in humans are responsible for carrying oxygen and carbon dioxide throughout the body.

A. They transport 80% of oxygen only, while the remaining 20% is transported in a dissolved state in blood plasma.

B. They transport 99.5% of O2.

They transport approximately 20-25% of the total CO2.

They do not carry CO2 at all.

The Hemoglobin of a Human Foetus in 2009

A. Its affinity for oxygen is equivalent to that of an adult.

B. has a lower affinity for oxygen than an adult does.

C has a higher affinity for oxygen than an adult.

D. has only two protein subunits instead of four.

None of the above

A. The presence of non-respiratory air sacs enhances the efficiency of respiration in birds.

B. The efficiency of respiration in mammals is slightly decreased by the residual air in the lungs.

C. The principle of countercurrent flow facilitates efficient respiration in the gills of fishes.

In insects, circulating body fluids help to transport oxygen to tissues.

Question Answer Key

| 1 | C |

| 2 | B |

| 3 | D |

| 4 | D |

| 5 | B |

| 6 | D |

| 7 | D |

| 8 | C |

| 9 | C |

| 10 | D |

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