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 complex network of organs and tissues responsible for facilitating the exchange of oxygen and carbon dioxide between the body and the environment. It plays a crucial role in maintaining the body’s homeostasis and overall health. The respiratory system is divided into the upper and lower respiratory tracts, each with distinct structures and functions.

The upper respiratory tract includes the nose, nasal cavity, sinuses, pharynx, and larynx. Air enters through the nose or mouth, where it is filtered, warmed, and humidified. The nasal cavity and sinuses play key roles in conditioning the air before it passes through the pharynx and larynx into the lower respiratory tract.

The lower respiratory tract comprises the trachea, bronchi, bronchioles, and alveoli. The trachea, or windpipe, extends from the larynx and divides into the left and right bronchi, which branch into smaller bronchioles within the lungs. The bronchioles terminate in clusters of alveoli, where the critical process of gas exchange occurs. Oxygen from inhaled air diffuses into the blood, while carbon dioxide from the blood diffuses into the alveoli to be exhaled.

The diaphragm, a dome-shaped muscle below the lungs, plays a vital role in breathing by contracting and relaxing to change the volume of the thoracic cavity, facilitating air movement in and out of the lungs.

Maintaining respiratory health is essential for overall well-being. Common respiratory conditions include asthma, chronic obstructive pulmonary disease (COPD), pneumonia, and bronchitis. Preventative measures such as avoiding smoking, minimizing exposure to pollutants, practicing good hygiene, and staying active can help preserve the function of the respiratory system.

In organic chemistry, understanding the respiratory system is crucial for studying how various compounds interact with the body. This knowledge aids in the development of treatments for respiratory diseases and assessing the impact of environmental pollutants on respiratory health.

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

Which structure prevents food from entering the trachea?

2 / 40

The upper respiratory tract includes which of the following structures?

3 / 40

Which part of the brain regulates breathing?

4 / 40

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

5 / 40

The function of the cilia in the trachea is to?

6 / 40

Which blood vessels surround the alveoli for gas exchange?

7 / 40

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

8 / 40

What is the primary function of the respiratory system?

9 / 40

Which cells in the alveoli produce surfactant?

10 / 40

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

11 / 40

The pulmonary veins carry blood to which organ?

12 / 40

The trachea is lined with what type of epithelium?

13 / 40

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

14 / 40

The primary function of the nasal hairs is to?

15 / 40

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

16 / 40

The alveoli are the site of which process?

17 / 40

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

18 / 40

The pleural cavity is located between which two layers?

19 / 40

What is the function of the nasal conchae?

20 / 40

The pleura is a membrane that covers which organ?

21 / 40

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

22 / 40

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

23 / 40

The alveolar ducts lead directly into which structures?

24 / 40

The respiratory system includes all of the following structures except?

25 / 40

Which part of the respiratory system contains the vocal cords?

26 / 40

The diaphragm contracts during which phase of respiration?

27 / 40

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

28 / 40

The Eustachian tube connects the pharynx to which structure?

29 / 40

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

30 / 40

The primary bronchi divide into smaller airways called?

31 / 40

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

32 / 40

The vocal cords are located in which structure?

33 / 40

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

34 / 40

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

35 / 40

Which structure connects the nasal cavity to the larynx?

36 / 40

How many lobes does the right lung have?

37 / 40

The trachea is also known as the?

38 / 40

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

39 / 40

The left lung has how many lobes?

40 / 40

The main airway that enters each lung is called?

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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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