Fibrous connective tissue builds up in the lungs causing them not to inflate properly, and actually deflating them is called:

1. chronic bronchitis

2. emphysema

3. pulmonary fibrosis

4. asthma

Subtopic:  Respiratory Disorders: Part 2 |
 68%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The C-shaped cartilaginous rings around the trachea are open posteriorly to:

(1) allow for expansion of the esophagus during swallowing 

(2) allow the vocal cords to relax

(3) prevent food from entering the nasal cavity during swallowing

(4) prevent food from entering the trachea

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 55%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The trachea is lined with

1. ciliated simple squamous epithelium
2. stratified squamous epithelium
3. pseudostratified ciliated columnar epithelium
4. pseudostratified squamous epithelium

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 55%
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NEET 2023 - Target Batch - Aryan Raj Singh
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When you hold your breath which of the following gas changes in blood would first lead to the urge to breathe?

(1) Falling O2 concentration

(2) Rising CO2 concentration

(3) Falling CO2 concentration

(4) Rising CO2 and falling O2 concentration

Subtopic:  Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 58%
NEET - 2015
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Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of

1. Residual Volume (RV)

2. Inspiratory Reserve Volume (IRV)

3. Tidal Volume (TV)

4. Expiratory Reserve Volume (ERV)

Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
 86%
From NCERT
NEET - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

The partial pressure of oxygen in the alveoli of the lungs is  

(1) equal to that in the blood

(2) more than that in the blood

(3) less than that in the blood

(4) less than that of carbon dioxide

Subtopic:  Respiratory System: Exchange of Gases |
 82%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

(1) there is a negative pressure in the lungs

(2) there is a negative intrapleural pressure pulling at the lung walls

(3) there is a positive intrapleural pressure

(4) pressure in the lungs in higher than the atmospheric pressure

Subtopic:  Respiratory System: Pulmonary Ventilation |
 59%
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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Reduction in pH of blood will

(1) reduce the blood supply to the brain

(2) decrease the affinity of hemoglobin with oxygen

(3) release bicarbonate ions by the liver

(4) reduce the rate of heart beat

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 84%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Name the chronic respiratory disorder caused mainly by cigarette smoking

1. asthma

2. respiratofy acidosis

3. respiratory alkalosis

4. emphysema

Subtopic:  Respiratory Disorders: Part 2 |
 92%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Approximately seventy percent of carbon dioxide absorbed by the blood will be

transported to the lungs

1. as bicarbonate ions

2. in the form of dissolved gas molecules

3. by binding to RBC

4. as carbamino-haemoglobin

Subtopic:  Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 86%
From NCERT
NEET - 2014
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh