MCQ on The Respiratory System
Frequently Asked MCQ quiz on the Respiratory System – MCQ Quiz for Competitive Exam Preparation – These questions given will be useful for competitive exams preparation. We will be updating more mcq regularly, please follow our website regularly.
Which structure prevents food from entering the respiratory tract during swallowing?
a) Larynx
b) Trachea
c) Epiglottis
d) Bronchi
Answer: c) Epiglottis
The primary gas exchange surface in the respiratory system is found in the:
a) Bronchioles
b) Alveoli
c) Trachea
d) Pharynx
Answer: b) Alveoli
Which of the following is not a function of the respiratory system?
a) Gas exchange
b) Regulation of blood pH
c) Vocalization
d) Regulation of blood glucose levels
Answer: d) Regulation of blood glucose levels
The process by which oxygen and carbon dioxide are exchanged between the lungs and the blood is called:
a) Respiration
b) Ventilation
c) Inhalation
d) Exhalation
Answer: a) Respiration
Which of the following muscles is primarily responsible for inspiration at rest?
a) Diaphragm
b) External intercostals
c) Internal intercostals
d) Abdominal muscles
Answer: a) Diaphragm
Which of the following gases is not found in inspired air?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Water vapor
Answer: b) Carbon dioxide
The main function of surfactant in the lungs is to:
a) Increase surface tension
b) Decrease surface tension
c) Increase lung compliance
d) Decrease lung compliance
Answer: b) Decrease surface tension
The structure that connects the larynx to the bronchi is called the:
a) Pharynx
b) Trachea
c) Epiglottis
d) Alveoli
Answer: b) Trachea
The exchange of gases between the blood and body tissues is called:
a) External respiration
b) Internal respiration
c) Pulmonary ventilation
d) Gas transport
Answer: b) Internal respiration
Which of the following is the correct pathway for air as it moves through the respiratory system?
a) Trachea → Bronchi → Bronchioles → Alveoli
b) Bronchi → Trachea → Alveoli → Bronchioles
c) Bronchioles → Trachea → Bronchi → Alveoli
d) Alveoli → Bronchioles → Bronchi → Trachea
Answer: a) Trachea → Bronchi → Bronchioles → Alveoli
The respiratory center that controls breathing is located in the:
a) Brainstem
b) Cerebellum
c) Cerebrum
d) Hypothalamus
Answer: a) Brainstem
The process of moving air into and out of the lungs is known as:
a) Respiration
b) Ventilation
c) Gas exchange
d) Oxygenation
Answer: b) Ventilation
Which of the following is not a part of the upper respiratory tract?
a) Trachea
b) Pharynx
c) Nasal cavity
d) Larynx
Answer: a) Trachea
Which of the following is a disorder characterized by inflammation and narrowing of the airways, leading to difficulty breathing?
a) Asthma
b) Emphysema
c) Pneumonia
d) Bronchitis
Answer: a) Asthma
Hemoglobin primarily carries which gas in the blood?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Answer: a) Oxygen
The volume of air inspired or expired with each breath during normal breathing is called:
a) Tidal volume
b) Vital capacity
c) Inspiratory reserve volume
d) Expiratory reserve volume
Answer: a) Tidal volume
Which of the following is not a component of the respiratory membrane where gas exchange occurs in the lungs?
a) Alveolar epithelium
b) Capillary endothelium
c) Surfactant
d) Basement membrane
Answer: c) Surfactant
The average adult breathes in and out approximately how many times per minute at rest?
a) 6-8 times
b) 12-16 times
c) 20-24 times
d) 30-34 times
Answer: b) 12-16 times
Which of the following statements about the pleurae is true?
a) The visceral pleura lines the thoracic cavity.
b) The parietal pleura covers the surface of the lungs.
c) The pleurae secrete mucus to lubricate the lungs during breathing.
d) The pleurae help to create a pressure gradient for lung expansion and recoil.
Answer: d) The pleurae help to create a pressure gradient for lung expansion and recoil.
The majority of carbon dioxide is transported in the blood:
a) Dissolved in plasma
b) Bound to hemoglobin
c) As bicarbonate ions
d) As carbon monoxide
Answer: c) As bicarbonate ions
The primary muscle(s) of expiration during quiet breathing is/are the:
a) Diaphragm
b) External intercostals
c) Internal intercostals
d) Abdominal muscles
Answer: c) Internal intercostals
Which of the following is not a risk factor for chronic obstructive pulmonary disease (COPD)?
a) Smoking
b) Air pollution
c) Genetic predisposition
d) Regular exercise
Answer: d) Regular exercise
The condition in which there is an abnormal accumulation of fluid in the pleural cavity is known as:
a) Pneumonia
b) Pleurisy
c) Pleural effusion
d) Pulmonary embolism
Answer: c) Pleural effusion
The respiratory control centers in the brain are primarily sensitive to changes in the levels of which gases?
a) Oxygen and carbon dioxide
b) Oxygen and nitrogen
c) Carbon dioxide and nitrogen
d) Carbon dioxide and hydrogen
Answer: a) Oxygen and carbon dioxide
The process by which oxygen is transported from the alveoli to the blood is called:
a) External respiration
b) Internal respiration
c) Pulmonary ventilation
d) Gas exchange
Answer: a) External respiration
Which of the following is not a function of the nasal cavity?
a) Filtration of air
b) Gas exchange
c) Warming and humidifying air
d) Smell reception
Answer: b) Gas exchange
The portion of the respiratory system where gas exchange occurs is known as the:
a) Alveoli
b) Bronchi
c) Trachea
d) Pharynx
Answer: a) Alveoli
The process of removing carbon dioxide from the blood and releasing it into the atmosphere is known as:
a) Inhalation
b) Exhalation
c) Inspiration
d) Respiration
Answer: b) Exhalation
Which of the following respiratory volumes represents the maximum amount of air that can be forcibly exhaled after a maximum inhalation?
a) Tidal volume
b) Inspiratory reserve volume
c) Expiratory reserve volume
d) Vital capacity
Answer: c) Expiratory reserve volume
In which part of the respiratory system does gas exchange with the bloodstream occur?
a) Trachea
b) Larynx
c) Bronchioles
d) Alveoli
Answer: d) Alveoli
FOLLOW YOUTUBE CHANNEL FOR MORE MCQS CLICK HERE
