PATHOLOGY MCQ
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nasal cavity, throat, bronchioles, bronchi, alveoli
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mouth, nasal cavity, bronchi, bronchioles, alveoli
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nasal cavity/mouth, trachea, bronchi, bronchus, alveoli
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nasal cavity/mouth, trachea, bronchi, bronchioles, alveoli
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Detailed explanation-1: -Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)
Detailed explanation-2: -When you inhale through your nose or mouth, air travels down your pharynx (back of your throat), passes through your larynx (voice box) and into your trachea (windpipe). Your trachea is divided into two air passages called bronchial tubes. One bronchial tube leads to your left lung, the other to your right lung.
Detailed explanation-3: -Air enters the lungs via the bronchi. Air is breathed through the nostrils, and the air in the nasal cavity is cleaned by the fine hair follicles that exist within them. A network of blood arteries in the hollow also helps to warm the air. This air then enters the pharynx, then the larynx, and finally the trachea.
Detailed explanation-4: -In a process called diffusion, oxygen moves from the alveoli to the blood through the capillaries (tiny blood vessels) lining the alveolar walls. Once in the bloodstream, oxygen gets picked up by the hemoglobin in red blood cells.