Human Body Systems

Lower Respiratory Tract MCQs with Answers

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

The lower respiratory tract is a crucial part of the human respiratory system, responsible for the vital process of gas exchange. It consists of the trachea, bronchi, bronchioles, and alveoli. The trachea, or windpipe, starts just below the larynx and extends down to the bronchi. The bronchi further branch into smaller bronchioles within the lungs, culminating in the alveoli, tiny air sacs where oxygen is exchanged for carbon dioxide in the blood.

Air travels through the trachea and enters the bronchi, which split into smaller bronchioles, ensuring the efficient distribution of air throughout the lungs. The bronchioles end in clusters of alveoli, where the crucial process of gas exchange occurs. Oxygen diffuses through the thin walls of the alveoli into the surrounding capillaries, while carbon dioxide diffuses from the blood into the alveoli to be expelled during exhalation.

Maintaining the health of the lower respiratory tract is essential for overall respiratory function. Conditions such as bronchitis, pneumonia, and chronic obstructive pulmonary disease (COPD) can significantly impair this system. Preventative measures like avoiding smoking, minimizing exposure to pollutants, and practicing good hygiene can help protect the lower respiratory tract from infections and diseases.

Lower Respiratory Tract Online Quiz

By presenting 3 options to choose from, Lower Respiratory Tract 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 Lower Respiratory Tract Questions and Answers and click over the correct answer.

  • Test Name: Lower Respiratory Tract 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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Lower Respiratory Tract MCQs

Lower Respiratory Tract

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1 / 40

The alveoli are lined with which type of cells?

2 / 40

Which blood vessels return oxygenated blood to the heart from the lungs?

3 / 40

The left lung has how many lobes?

4 / 40

The primary bronchi branch off from which structure?

5 / 40

Which part of the respiratory system contains the vocal cords?

6 / 40

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

7 / 40

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

8 / 40

The alveolar ducts lead directly into which structures?

9 / 40

Which structure prevents food from entering the trachea?

10 / 40

The bronchi and bronchioles are part of which respiratory tract?

11 / 40

The lower respiratory tract begins at which structure?

12 / 40

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

13 / 40

The function of the cilia in the trachea is to?

14 / 40

What is the main function of the bronchioles?

15 / 40

Which blood vessels surround the alveoli for gas exchange?

16 / 40

Which part of the respiratory system serves as the main passageway for air into the lungs?

17 / 40

During exhalation, the diaphragm moves in which direction?

18 / 40

The right lung is larger than the left lung to accommodate which structure?

19 / 40

Which structure divides the thoracic cavity into two pleural cavities?

20 / 40

Which component of the lower respiratory tract contains cartilage?

21 / 40

What is the name of the smallest airways in the lungs?

22 / 40

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

23 / 40

What structure is located at the end of the bronchioles?

24 / 40

Which part of the lung has the highest oxygen concentration during gas exchange?

25 / 40

Which muscle primarily assists with inhalation?

26 / 40

The main bronchi divide into smaller branches called?

27 / 40

The pleura is a double-layered membrane that covers the?

28 / 40

What substance is produced by Type II alveolar cells?

29 / 40

The respiratory bronchioles lead into which structures?

30 / 40

The trachea divides into the left and right primary bronchi at which vertebral level?

31 / 40

The pulmonary veins carry blood to which organ?

32 / 40

The pleural cavity is located between which two layers?

33 / 40

Which type of cells in the alveoli are responsible for phagocytosis?

34 / 40

During inhalation, the diaphragm moves in which direction?

35 / 40

The exchange of gases between the blood and the alveoli is called?

36 / 40

The trachea is also known as the?

37 / 40

The trachea is reinforced by which structures?

38 / 40

The trachea is lined with what type of epithelium?

39 / 40

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

40 / 40

Which type of blood is carried by the pulmonary arteries?

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Lower Respiratory Tract Flashcards

The lower respiratory tract begins at which structure?

Trachea

The primary bronchi branch off from which structure?

Trachea

What is the main function of the bronchioles?

Conduct air to the alveoli

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

Alveoli

The alveoli are lined with which type of cells?

Simple squamous epithelial cells

What substance is produced by Type II alveolar cells?

Surfactant

The trachea is reinforced by which structures?

Cartilaginous rings

Which part of the respiratory system serves as the main passageway for air into the lungs?

Trachea

The main bronchi divide into smaller branches called?

Bronchioles

Which muscle primarily assists with inhalation?

Diaphragm

Which blood vessels surround the alveoli for gas exchange?

Capillaries

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

Shorter and wider

The pleura is a double-layered membrane that covers the?

Lungs

The trachea divides into the left and right primary bronchi at which vertebral level?

T4-T5

What is the name of the smallest airways in the lungs?

Terminal bronchioles

The left lung has how many lobes?

Two

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

Reduce surface tension

During inhalation, the diaphragm moves in which direction?

Downward

Which structure prevents food from entering the trachea?

Epiglottis

The pleural cavity is located between which two layers?

Parietal and visceral pleura

The exchange of gases between the blood and the alveoli is called?

External respiration

Which type of blood is carried by the pulmonary arteries?

Deoxygenated

The bronchi and bronchioles are part of which respiratory tract?

Lower respiratory tract

The alveolar ducts lead directly into which structures?

Alveolar sacs

The trachea is also known as the?

Windpipe

Which part of the respiratory system contains the vocal cords?

Larynx

What structure is located at the end of the bronchioles?

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

Which component of the lower respiratory tract contains cartilage?

Trachea

The trachea is lined with what type of epithelium?

Pseudostratified ciliated columnar

The function of the cilia in the trachea is to?

Move mucus out

Which structure divides the thoracic cavity into two pleural cavities?

Mediastinum

During exhalation, the diaphragm moves in which direction?

Upward

Which type of cells in the alveoli are responsible for phagocytosis?

Macrophages

The right lung is larger than the left lung to accommodate which structure?

Heart

Which part of the lung has the highest oxygen concentration during gas exchange?

Alveoli

The respiratory bronchioles lead into which structures?

Alveolar ducts

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

Alveoli

Which blood vessels return oxygenated blood to the heart from the lungs?

Pulmonary veins

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