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Respiratory System and Its Functions Quiz

#1

Which structure in the respiratory system is responsible for exchanging oxygen and carbon dioxide in the blood?

Alveoli
Explanation

Gas exchange site in the lungs

#2

What is the main function of the cilia in the respiratory system?

Filtering and moving foreign particles
Explanation

Clearing airways of debris and pathogens

#3

Which part of the respiratory system contains vocal cords and is responsible for speech production?

Larynx
Explanation

Voice box housing vocal cords

#4

What is the term for the process of air moving in and out of the lungs during breathing?

Ventilation
Explanation

Mechanism of breathing involving lung air exchange

#5

What is the role of the respiratory system in maintaining acid-base balance in the body?

Excreting excess carbon dioxide
Explanation

Removing CO2 to regulate blood pH

#6

What is the primary function of the epiglottis in the respiratory system?

Preventing food from entering the windpipe
Explanation

Protects the airway during swallowing

#7

Which respiratory disorder is characterized by chronic inflammation of the bronchial tubes, leading to difficulty in breathing?

Bronchitis
Explanation

Inflammation of bronchial tubes causing breathing problems

#8

Which gas is a waste product of cellular respiration and is expelled during the process of breathing?

Carbon dioxide
Explanation

Waste gas released from cells

#9

What role do the surfactant-producing cells play in the respiratory system?

Reducing surface tension in the alveoli
Explanation

Preventing alveolar collapse

#10

What is the purpose of the mucociliary escalator in the respiratory system?

Moving mucus and trapped particles out of the respiratory tract
Explanation

Clearing respiratory passages of debris

#11

What is the term for the volume of air inspired and expired with each breath during normal breathing?

Tidal volume
Explanation

Amount of air breathed in and out during normal breathing

#12

Which respiratory muscle plays a crucial role in the process of inspiration?

Diaphragm
Explanation

Primary muscle for expanding the chest cavity

#13

Which part of the brain primarily controls the rate and depth of breathing?

Medulla oblongata
Explanation

Brainstem region regulating breathing

#14

During exercise, what happens to the respiratory rate and tidal volume?

Increase
Explanation

Both respiratory rate and tidal volume go up

#15

What is the term for the maximum amount of air a person can exhale forcefully after a maximum inhalation?

Vital capacity
Explanation

Total volume of air exhaled after maximum inhalation

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