In which part of the respiratory system, gaseous exchange takes place?

(a) Alveoli (c) Larynx (b) Pharynx (d) Trachea

_____is located between two pleural sacs and is the central compartment of the thoracic cavity?

(a) Hilum (b) Pleura (c) Mediastinum (d) Thoracic cage

Which of the following statements is true about involuntary breathing?

(a) It is controlled by the bronchioles (b) It is controlled by the pulmonary arterioles (c) It is controlled by the alveolar-capillary network (d) It is controlled by the neurons, located in the medulla and pons

Which of the following are parts of the human respiratory system?

(a) Trachea (b) Diaphragm (c) The lungs (d) All of the above

Which of the following gas is released out during the process of respiration?

(a) Oxygen (b) Hydrogen (c) Carbon dioxide (d) None of the above

The tiny air sacs present man lungs are called

(a) Alveoli (b) Bronchus (c) Bronchioles (d) All of the above

Which of the following functions by filtering and keeping the mucus and dirt away from our lungs?

(a) Cilia (b) Bronchioles (c) Hairs in the lungs (d) All of the above

The total number of alveoli present in the human lungs is estimated to be around

(a) 1 billion (b) 800 million (c) 500 million (d) 1500 million

The exchange of gases between the external environment and the lungs

(a) Respiration (b) External respiration (c) Cellular respiration (d) None of the above

Which one of the following statements is false about the trachea?

(a) Has C-shaped rings (b) It is covered by epiglottis (c) It splits into the right and left lungs (d) None of the above

The maximum volume of air contained in the lung by a full forced inhalation is called

(a) Tidal volume (b) Vital capacity (c) Ventilation rate (d) Total lung capacity

Which one of the following is correct regarding the larynx?

(a) It houses the vocal cords (b) It prevents the invading pathogens into the trachea (c) It is an organ made of cartilage and connects the pharynx to the trachea (d) All of the above

Which of the following is the function of the trachea?

(a) Gaseous Exchange (b) Filters the air we breathe (c) Exhales the air from the body (d) All of the above

Which of these statements is true about internal respiration?

(a) Production of ATP (b) Exchange of gases between the bloodstream and tissue cells (c) Exchange of gases between alveoli and the bloodstream (d) Breathing between the atmosphere and the alveoli

Which of the following organs functions as an air conditioner?

(a) Larynx (b) Pharynx (c) Nasal chambers (d) All of the above

The gas which stimulates respiration is

(a) Nitrogen (b) Oxygen (c) Carbon dioxide

The maximum amount of air that can be expired after the deepest inspiration is called

(a) Vital capacity (b) Tidal volume (c) Peak inspiratory volume

Lecithin is a substance present in

(a) Oropharynx (b) Bronchial tubes (c) Alveoli

Smoking is one of the causes of

(a) Hypoxia (b) Emphysema (c) Narcosis

The most important factor in determining the percent oxygen saturation of hemoglobin is

(a) The partial pressure of O₂ (b) Acidity (c) The partial pressure of CO₂

The internal lining of the trachea has a membrane of

(a) Ciliated endothelium (b) Squamous epithelium (c) Connective tissue cells (d) Mucous cells

The mediastinum is the name of

(a) Left lung (b) Cartilage in the larynx (c) Fold in between the Lungs (d) Covering on the lungs

During normal breathing, the amount of air that moves into the lungs and comes out is called

(a) IRV (b) Residual volume (c) ERV (d) TV

(a) Pure oxygen (b) Partial oxygen (c) Pressure of oxygen (d) Partial pressure of oxygen

Conchae are present in the

(a) Cardiac notch (b) Voicebox (c) Diaphragm (d) Nasal cavity

FAQ about Respiratory System

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C-shaped cartilaginous rings are present in

Trachea, Bronchi and Bronchioles

The amount of air exhaled in forced exhalation is called

Expiratory Reserve Volume (ERV)

The respiratory organs are

Nose, Pharynx, Larynx, Trachea, Bronchi, Bronchioles, and Lungs

Three anatomic regions of the pharynx are

Nasopharynx, Oropharynx, and Laryngopharynx

25 Important Respiratory System MCQ Questions and Answers

In which part of the respiratory system, gaseous exchange takes place?

(a) Alveoli
(c) Larynx
(b) Pharynx
(d) Trachea
_____is located between two pleural sacs and is the central compartment of the thoracic cavity?

(a) Hilum
(b) Pleura
(c) Mediastinum
(d) Thoracic cage
Which of the following statements is true about involuntary breathing?

(a) It is controlled by the bronchioles
(b) It is controlled by the pulmonary arterioles
(c) It is controlled by the alveolar-capillary network
(d) It is controlled by the neurons, located in the medulla and pons

Which of the following are parts of the human respiratory system?

(a) Trachea
(b) Diaphragm
(c) The lungs
(d) All of the above
Which of the following gas is released out during the process of respiration?

(a) Oxygen
(b) Hydrogen
(c) Carbon dioxide
(d) None of the above
The tiny air sacs present man lungs are called

(a) Alveoli
(b) Bronchus
(c) Bronchioles
(d) All of the above

Which of the following functions by filtering and keeping the mucus and dirt away from our lungs?

(a) Cilia
(b) Bronchioles
(c) Hairs in the lungs
(d) All of the above
The total number of alveoli present in the human lungs is estimated to be around

(a) 1 billion
(b) 800 million
(c) 500 million
(d) 1500 million
The exchange of gases between the external environment and the lungs

(a) Respiration
(b) External respiration
(c) Cellular respiration
(d) None of the above

Which one of the following statements is false about the trachea?

(a) Has C-shaped rings
(b) It is covered by epiglottis
(c) It splits into the right and left lungs
(d) None of the above
The maximum volume of air contained in the lung by a full forced inhalation is called

(a) Tidal volume
(b) Vital capacity
(c) Ventilation rate
(d) Total lung capacity
Which one of the following is correct regarding the larynx?

(a) It houses the vocal cords
(b) It prevents the invading pathogens into the trachea
(c) It is an organ made of cartilage and connects the pharynx to the trachea
(d) All of the above

Which of the following is the function of the trachea?

(a) Gaseous Exchange
(b) Filters the air we breathe
(c) Exhales the air from the body
(d) All of the above
Which of these statements is true about internal respiration?

(a) Production of ATP
(b) Exchange of gases between the bloodstream and tissue cells
(c) Exchange of gases between alveoli and the bloodstream
(d) Breathing between the atmosphere and the alveoli
Which of the following organs functions as an air conditioner?

(a) Larynx
(b) Pharynx
(c) Nasal chambers
(d) All of the above

The gas which stimulates respiration is

(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
The maximum amount of air that can be expired after the deepest inspiration is called

(a) Vital capacity
(b) Tidal volume
(c) Peak inspiratory volume
Lecithin is a substance present in

(a) Oropharynx
(b) Bronchial tubes
(c) Alveoli

Smoking is one of the causes of

(a) Hypoxia
(b) Emphysema
(c) Narcosis
The most important factor in determining the percent oxygen saturation of hemoglobin is

(a) The partial pressure of O₂
(b) Acidity
(c) The partial pressure of CO₂
The internal lining of the trachea has a membrane of

(a) Ciliated endothelium
(b) Squamous epithelium
(c) Connective tissue cells
(d) Mucous cells

The mediastinum is the name of

(a) Left lung
(b) Cartilage in the larynx
(c) Fold in between the Lungs
(d) Covering on the lungs
During normal breathing, the amount of air that moves into the lungs and comes out is called

(a) IRV
(b) Residual volume
(c) ERV
(d) TV
PO₂ stands for:

(a) Pure oxygen
(b) Partial oxygen
(c) Pressure of oxygen
(d) Partial pressure of oxygen

Conchae are present in the

(a) Cardiac notch
(b) Voicebox
(c) Diaphragm
(d) Nasal cavity
FAQ about Respiratory System

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Covering the membrane of the lungs is

Pleura

C-shaped cartilaginous rings are present in

Trachea, Bronchi and Bronchioles
Difficulty in breathing is termed as

Dyspnoea
The thyroid cartilage of the larynx is also called

Adams’ Apple

A deficiency of oxygen at the tissue level is called

Hypoxia
Above normal partial pressure of CO₂ is called

Hypercapnia
Rapid and deep breathing is called

Hyperventilation

The total volume of air inhaled and exhaled each minute is called

Minute Ventilation
The volume of air in one breath is called

Tidal Volume
The amount of air exhaled in forced exhalation is called

Expiratory Reserve Volume (ERV)

The respiratory organs are

Nose, Pharynx, Larynx, Trachea, Bronchi, Bronchioles, and Lungs
The internal portion of the nose communicates with the nasopharynx through the

Internal Nares
The anterior part of the nasal cavity is called the

Vestibule

Three anatomic regions of the pharynx are

Nasopharynx, Oropharynx, and Laryngopharynx
The cartilage which connects the larynx and trachea is called the

Cricoid Cartilage