#1
Which structure is responsible for gas exchange in the human respiratory system?
Alveoli
ExplanationAlveoli facilitate the exchange of oxygen and carbon dioxide in the lungs.
#2
What is the function of the epiglottis?
To regulate the flow of air into the lungs
ExplanationEpiglottis prevents food and drink from entering the airway during swallowing.
#3
What is the primary function of the cilia in the respiratory tract?
To filter out dust and debris
ExplanationCilia help to remove foreign particles and mucus from the respiratory tract.
#4
Which respiratory disorder is characterized by inflammation and narrowing of the airways?
Bronchitis
ExplanationBronchitis causes inflammation of the bronchial tubes, restricting airflow.
#5
What is the role of the diaphragm in the respiratory system?
To facilitate inhalation and exhalation
ExplanationThe diaphragm contracts and relaxes to change the volume of the thoracic cavity, aiding in breathing.
#6
Which of the following is NOT a function of the respiratory system?
Production of hormones
ExplanationThe respiratory system primarily facilitates gas exchange and does not produce hormones.
#7
Which substance is primarily responsible for causing emphysema?
Nicotine
ExplanationNicotine damages lung tissue and contributes to emphysema development.
#8
How does carbon monoxide affect the body?
It binds to hemoglobin more strongly than oxygen, reducing oxygen transport
ExplanationCarbon monoxide reduces the oxygen-carrying capacity of blood, leading to oxygen deprivation.
#9
Which substance is found in cigarette smoke and is associated with lung cancer?
Arsenic
ExplanationArsenic, along with other carcinogens in cigarette smoke, increases the risk of lung cancer.
#10
What is the role of surfactant in the alveoli?
To prevent alveolar collapse
ExplanationSurfactant reduces surface tension in the alveoli, preventing collapse during exhalation.
#11
Which respiratory disorder is characterized by inflammation of the bronchial tubes?
Bronchitis
ExplanationBronchitis involves inflammation of the bronchial tubes, leading to cough and mucus production.
#12
How does smoking increase the risk of cardiovascular diseases?
By damaging blood vessel walls and promoting plaque buildup
ExplanationSmoking damages blood vessels and promotes atherosclerosis, increasing the risk of cardiovascular diseases.
#13
Which of the following is a symptom of asthma?
Coughing and wheezing
ExplanationAsthma causes airway inflammation, leading to coughing and wheezing.
#14
Which of the following is a characteristic symptom of chronic obstructive pulmonary disease (COPD)?
Persistent cough with mucus production
ExplanationCOPD leads to chronic inflammation and mucus production, resulting in a persistent cough.
#15
Which of the following is a treatment option for sleep apnea?
Continuous positive airway pressure (CPAP) therapy
ExplanationCPAP therapy helps keep the airway open during sleep, alleviating sleep apnea symptoms.
#16
Which of the following is a function of the nasal cavity?
Warming and humidifying inhaled air
ExplanationThe nasal cavity warms and humidifies inhaled air, preparing it for the lungs.
#17
Which of the following is a characteristic symptom of chronic bronchitis?
Persistent productive cough
ExplanationChronic bronchitis causes a persistent cough with production of thick mucus.