#1
Which organ is primarily responsible for the exchange of oxygen and carbon dioxide in the human body?
Lungs
ExplanationThe lungs facilitate the exchange of oxygen and carbon dioxide during respiration.
#2
What is the role of the diaphragm in breathing?
Muscular contraction for inhalation
ExplanationThe diaphragm contracts during inhalation to increase the volume of the thoracic cavity.
#3
What is the role of the epiglottis in the respiratory system?
Preventing food from entering the trachea
ExplanationThe epiglottis covers the trachea during swallowing to prevent food from entering the airway.
#4
What is the primary function of the respiratory system?
Facilitating gas exchange
ExplanationThe respiratory system facilitates the exchange of gases, primarily oxygen and carbon dioxide, between the body and the environment.
#5
What is the term for the process of breathing out air from the lungs?
Expiration
ExplanationExpiration is the process of exhaling air from the lungs.
#6
What is the term for the process by which oxygen is taken in and carbon dioxide is expelled by the respiratory system?
Respiration
ExplanationRespiration is the process of gas exchange where oxygen is taken in and carbon dioxide is expelled by the respiratory system.
#7
Which of the following is not a part of the upper respiratory system in humans?
Trachea
ExplanationThe trachea is part of the lower respiratory system.
#8
In the respiratory system, what is the primary function of the cilia lining the airways?
Filtering air
ExplanationCilia help to filter out dust and other particles from the air.
#9
Which respiratory center in the brain is responsible for automatic, rhythmic breathing?
Medulla Oblongata
ExplanationThe medulla oblongata controls involuntary functions like breathing.
#10
Which gas is a waste product produced during cellular respiration and is transported back to the lungs for exhalation?
Carbon Dioxide (CO2)
ExplanationCarbon dioxide is produced as a waste product during cellular respiration and is exhaled from the lungs.
#11
What is the primary function of the pleurae in the respiratory system?
Protection of lungs
ExplanationThe pleurae provide protection and reduce friction during breathing.
#12
What is the role of surfactant in the respiratory system?
Prevents lung collapse
ExplanationSurfactant reduces surface tension in the alveoli, preventing lung collapse.
#13
Which respiratory disorder is characterized by the narrowing of the airways, leading to difficulty in breathing?
Asthma
ExplanationAsthma is characterized by airway inflammation and constriction.
#14
What is the primary gas exchanged during external respiration in the lungs?
Oxygen (O2)
ExplanationOxygen is taken in from the air during external respiration.
#15
Which respiratory volume represents the maximum amount of air a person can exhale forcibly after a maximum inhalation?
Vital Capacity
ExplanationVital capacity is the maximum amount of air that can be exhaled after a deep inhalation.
#16
Which respiratory disorder is characterized by the inflammation and narrowing of the bronchial tubes?
Asthma
ExplanationAsthma involves inflammation and constriction of the bronchial tubes.
#17
During internal respiration, where does the exchange of gases occur?
Alveoli
ExplanationGas exchange occurs between the alveoli and the bloodstream during internal respiration.