11. Structure in the trachea that prevent its collapse or overe pressures change
ID: 268180 • Letter: 1
Question
11. Structure in the trachea that prevent its collapse or overe pressures change in the respiratory system are the: xpansion as aO-ringed tracheal cartilages b C-shaped tracheal cartilages irregular circular bones S-shaped tracheal bones c. d. 12. The entry of liquids or solid food into the respiratory passageways during swallowing is prohibited by the a. glottis folding back over the epiglottis b. expansion of the cricoid cartilages c. epiglottis folding back over the glottis d. depression of the larynx 3. If food particles or liquid manage to touch the surfaces of the ventricular or vocal folds the a. individual will choke to death coughing reflex will be triggered c. glottis will remain open d. epiglottis will not function atoms of 14. Each molecule ofhemoglobin has the capacity to carry oxygen (O2): a. C. d. 2 15. Pulmonary ventilation refers to the: a. gas exchange between the blood and the alveoli b. amount of air in the anatomic dead space c. movement of air in and out of the lungs movements of air in the upper respiratory tractExplanation / Answer
(11) Structures in the trachea that prevent its collapse or overexpansion as pressure change in the respiratory system are option (b) C-shaped tracheal cartilages (rings).
(12) The entry of liquids or solid food into the respiratory passageways during swallowing is prevented by option (c) epiglottis folding back over the glottis. During swallowing, the larynx is elevated and the epiglottis folds back over the glottis to prevent the entry of both liquid and solid foods into the respiratory tract.
(13) If food particles or liquids manage to touch the surfaces of the ventricular or vocal folds the: option (b) coughing reflex will be triggered. Coughing reflex is a protective mechanism to protect the airways from harmful irritants.
(14) Each molecule of hemoglobin has the capacity to carry ______ molecules of oxygen (O2)? Option (c) 4. Hemoglobin is a tetramer of four globin subunits with each unit having an oxygen binding heme (Fe2+) group.
(15) Pulmonary ventilation refers to the: option (c) movement of air into and out of the lungs. Infact in technical terms breathing is actually referred to as 'pulmonary ventilation'.
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