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26 Cards in this Set
- Front
- Back
These air filled sacs lighten the skull
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sinuses
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The primary muscle responsible for breathing is the ____
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diaphragm
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When the volume of this structure increases, pressure in the airways decrease and inspiration occurs.
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Thorax
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The three divisions of the thoracic cavity are:
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right and left pleural cavity, mediastinum
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These muscles pull the ribs up and outward which causes the chest to become wider.
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External instercostals and pectoralis minor
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The three divisions of the pharynx are:
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oropharynx, nasopharynx, laryngopharynx
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The tonsils located in the nasopharynx are called
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Adenoids
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Three functions of the pharynx are"
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passageway for air, passageway for food, aids in phonation
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What type of cells are found in the respiratory mucosa?
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Pseudostratified ciliated columnar epithelium
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This cartilage in the larynx resembles a signet ring.
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Cricoid cartilage
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The lower respiratory tree begins with this structure
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trachea
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Place the following air distributors in ascending order according to size: alveolar duct, primary bronchi, bronchioles, trachea, secondary bronchi
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alveolar duct, bronchioles, secondary bronchi, primary bronchi, trachea
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These structures have c-shaped rings of cartilage in their walls
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trachea, primary bronchi
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These structures serve as air distributors and gas exchangers
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lungs
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This tissue covers the outer surface of the lungs.
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visceral pleura
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the volume of air exhaled after a normal expiration is called:
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Tidal volume
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The device used to measure pulmonary volumes is called a ___
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spirometer
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The volume that can not be forcefully expired is the ___.
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residual volume
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IRV+ERV+TV=
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VC vital capacity
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This area contains air that is not participating in gas exchange.
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anatomical dead space
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Gases move from one area to another as a result of a pressure ___ between the areas.
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gradient
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Pulmonary gas exchange takes place between the _____ and ___.
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alveoli and blood
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Which gas law is referred to as the law of partial pressures?
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Dalton's law
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If PO2 is 40 mm hg in tissue and 70 mm Hg in the capillaries , which area will oxygen move into?
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Tissue
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Name two factors that will influence the amount of oxygen that diffuses into blood.
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PO2 gradient between alveolar air and pulmonary blood; total functional surface area of the respiratory membrane
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Which regulatory control center prevents overinflation of the lungs?
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Pneumotaxic center
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