Human Body Systems

Respiratory System MCQs with Answers

Welcome to the Respiratory System MCQs with Answers. In this post, we have shared Respiratory System Online Test for different competitive exams. Find practice Respiratory System Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Respiratory System.

The respiratory system is a very complex, inter-linked network of organs and structures that serve mainly to facilitate the exchange of gases, primarily oxygen and carbon dioxide, between the body and the environment. Main components include the nose, pharynx, larynx, trachea, bronchi, lungs, and diaphragm.

This is the respiration process, which begins with the inhalation of air into the body through the mouth or nose. This air passes through the nasal cavity, where it is filtered, warmed, and moistened before flowing down to the pharynx and larynx, down the trachea, left, and right bronchi which enter into the lungs.

Within the lungs, bronchi dilate into bronchioles that open up into tiny alveoli sacs. The area is permeated by a network of capillaries, and it is here where the exchange of gas takes place. Oxygen from the air diffuses in while carbon dioxide, a byproduct of metabolism, diffuses out-from the blood into the alveoli-since it must be exhaled.

There is a bell-shaped muscle located under the lungs that aids in conducting respiration. As it contracts, this muscle expands volume that may allow air to be admitted into the lungs, and on its relaxation, volume in the cavity decreases which pushes air forward.

The respiratory system controls blood pH, as well as acts as a filter of harmful substances and permits voice control, apart from gas exchange. Thus, the working of the respiratory system will depend on the overall health, effectively taking oxygen to cells to work while removing carbon dioxide.

Respiratory System Online Quiz

By presenting 3 options to choose from, Respiratory System Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Respiratory System Questions and Answers and click over the correct answer.

  • Test Name: Respiratory System MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

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Respiratory System MCQs

Respiratory System

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1 / 40

The function of the cilia in the trachea is to?

2 / 40

The pleural cavity is located between which two layers?

3 / 40

The alveolar ducts lead directly into which structures?

4 / 40

The primary bronchi divide into smaller airways called?

5 / 40

Which structure is the main passageway for air into the respiratory system?

6 / 40

The right primary bronchus is different from the left because it is?

7 / 40

The primary function of the nasal hairs is to?

8 / 40

What is the primary function of the respiratory system?

9 / 40

Which structure in the lower respiratory tract is responsible for gas exchange?

10 / 40

Which part of the pharynx is a common pathway for both air and food?

11 / 40

Which muscle plays a crucial role in the process of breathing?

12 / 40

What is the function of the nasal conchae?

13 / 40

The right lung is shorter than the left lung due to which organ's presence?

14 / 40

The upper respiratory tract includes which of the following structures?

15 / 40

The left lung has how many lobes?

16 / 40

The pleura is a membrane that covers which organ?

17 / 40

Which structure connects the nasal cavity to the larynx?

18 / 40

Which structure prevents food from entering the trachea?

19 / 40

Which part of the brain regulates breathing?

20 / 40

The respiratory system includes all of the following structures except?

21 / 40

The Eustachian tube connects the pharynx to which structure?

22 / 40

The vocal cords are located in which structure?

23 / 40

The pulmonary veins carry blood to which organ?

24 / 40

The alveoli are the site of which process?

25 / 40

Which part of the respiratory system contains the vocal cords?

26 / 40

How many lobes does the right lung have?

27 / 40

The trachea is also known as the?

28 / 40

The alveolar walls are primarily composed of which type of cells?

29 / 40

What is the name of the small air sacs in the lungs?

30 / 40

What is the main function of the surfactant in the alveoli?

31 / 40

Which part of the pharynx is located behind the nasal cavity?

32 / 40

Oxygenated blood is returned to the heart from the lungs via which vessels?

33 / 40

The trachea is lined with what type of epithelium?

34 / 40

Which blood vessels surround the alveoli for gas exchange?

35 / 40

The diaphragm contracts during which phase of respiration?

36 / 40

The primary site of gas exchange in the lungs occurs in the?

37 / 40

The exchange of gases in the lungs occurs across which structure?

38 / 40

Which cells in the alveoli produce surfactant?

39 / 40

The main airway that enters each lung is called?

40 / 40

The primary function of the cilia in the nasal cavity is to?

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Respiratory System Flashcards

What is the primary function of the respiratory system?

Gas exchange

Which structure is the main passageway for air into the respiratory system?

Nose

The trachea is also known as the?

Windpipe

The alveoli are the site of which process?

Gas exchange

The diaphragm contracts during which phase of respiration?

Inhalation

Which muscle plays a crucial role in the process of breathing?

Diaphragm

What is the function of the nasal conchae?

Increase surface area

The exchange of gases in the lungs occurs across which structure?

Alveolar-capillary membrane

Which structure prevents food from entering the trachea?

Epiglottis

How many lobes does the right lung have?

Three

The pleura is a membrane that covers which organ?

Lungs

The left lung has how many lobes?

Two

What is the name of the small air sacs in the lungs?

Alveoli

The right primary bronchus is different from the left because it is?

Shorter and wider

The function of the cilia in the trachea is to?

Move mucus out

The respiratory system includes all of the following structures except?

Esophagus

The primary function of the nasal hairs is to?

Filter large particles

Which part of the respiratory system contains the vocal cords?

Larynx

The main airway that enters each lung is called?

Bronchus

Which part of the brain regulates breathing?

Medulla oblongata

Oxygenated blood is returned to the heart from the lungs via which vessels?

Pulmonary veins

Which cells in the alveoli produce surfactant?

Type II alveolar cells

The upper respiratory tract includes which of the following structures?

Nasal cavity

The primary site of gas exchange in the lungs occurs in the?

Alveoli

Which part of the pharynx is located behind the nasal cavity?

Nasopharynx

The trachea is lined with what type of epithelium?

Pseudostratified ciliated columnar

Which structure connects the nasal cavity to the larynx?

Pharynx

Which part of the pharynx is a common pathway for both air and food?

Oropharynx

The primary bronchi divide into smaller airways called?

Bronchioles

The pleural cavity is located between which two layers?

Parietal and visceral pleura

The right lung is shorter than the left lung due to which organ's presence?

Liver

Which structure in the lower respiratory tract is responsible for gas exchange?

Alveoli

The alveolar walls are primarily composed of which type of cells?

Type I alveolar cells

The pulmonary veins carry blood to which organ?

Heart

The vocal cords are located in which structure?

Larynx

What is the main function of the surfactant in the alveoli?

Reduce surface tension

The alveolar ducts lead directly into which structures?

Alveolar sacs

The primary function of the cilia in the nasal cavity is to?

Move mucus

The Eustachian tube connects the pharynx to which structure?

Middle ear

Which blood vessels surround the alveoli for gas exchange?

Capillaries

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