Chapter 22

25 July 2022
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question
The upper respiratory tract is vulnerable to infection and inflammation. What part of the upper respiratory tract is involved in sinusitis?
answer
Paranasal sinuses
question
The superior boundary of the nasal cavity is formed by which structure(s)?
answer
sphenoid and ethmoid bones
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What is the function of type I alveolar cells in the alveolar walls?
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external gas exchange in the lungs
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How would a stab wound that has punctured the pleural cavity on the right lateral side at the level of intercostal space 8 affect the right lung?
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the right lung would collapse
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Where does internal respiration take place?
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at systemic capillaries, between blood and tissue cells
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One of the cells that line the air sacs in the lungs produce a substance called surfactant. What condition would arise if surfactant was not produced?
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The air sacs would tend to collapse because of increased surface tension.
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What is the function of alveolar macrophages found within and between alveoli?
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removal of microscopic inhaled particles
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Which muscles are active during normal inspiration?
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diaphragm and intercostal muscles
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Which region of the bronchial tree is NOT in the conducting zone?
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alveoli
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What are the components of the respiratory membrane?
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alveolar and capillary walls and their fused basal laminae
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Which laryngeal cartilage is composed of elastic cartilage?
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epiglottis
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At which level of the respiratory tree is there no cartilage, where smooth muscle takes on an important role in regulating the amount of airflow through the tubule?
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bronchioles
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As inspiratory muscles contract, the diaphragm moves inferiorly. Simultaneously, what other event occurs?
answer
Volumes of the thorax and lungs increase, which decreases pressure and draws air into the lungs.
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Inflammation of the lining of the thoracic cavity is known as?
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pleurisy
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Loudness of the voice depends on __________.
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the force with which air rushes across the vocal folds
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The upper respiratory tract is vulnerable to infection and inflammation. Inflammation of the vocal folds is known as?
answer
laryngitis
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What is the histological significance of the mucosa of the oropharynx that is comprised of stratified squamous epithelium?
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The area is subject to abrasion from food, so protection and regeneration are important.
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Decreasing the surface area of the respiratory membrane would most directly affect which of the following? internal respiration transport of respiratory gases external respiration pulmonary ventilation
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external respiration
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Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by ________.
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diffusion
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The nasopharynx ________.
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serves only as an air passageway
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Terminal bronchioles lead directly into _______.
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respiratory bronchioles
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All of the following contain alveoli EXCEPT ________. terminal bronchioles alveolar sacs alveolar ducts respiratory bronchioles
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terminal bronchioles
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All of the following are functions of the nose EXCEPT ________. moistening incoming air cooling incoming air housing olfactory receptors filtering particles and bacteria out of inspired air
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cooling incoming air
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The laryngeal prominence is formed by the ________.
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thyroid cartilage
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For gas exchange to be efficient, the respiratory membrane must be ________.
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0.5 to 1 micrometer thick
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Which of the following occurs during quiet expiration?
answer
the lungs recoil
question
Compared to those of Elmo (a Sesame Street monster with a high-pitched voice), the vocal folds of Darth Vader (a Star Wars character with a deep voice) are likely to be ________.
answer
longer and thicker