Flashcards in Chapter 16 Deck (45):
Microorganisms removed from incoming air by sticky mucus are most likely to be destroyed by
the digestive action of gastric juice.
Which of the following bones does not possess sinuses?
Which of these laryngeal cartilages occurs singly rather than in pairs?
The pitch of a vocal sound is controlled by changing the
tension on the vocal cord.
The walls of the alveoli are composed of
SIMPLE SQUAMOUS epithelium.
The force that causes air to move into the lungs during inspiration is supplied by
The force responsible for normal expiration is supplied by the
elastic recoil of tissues and surface tension.
The amount of air that enters or leaves the lungs during a normal respiratory cycle is the
Which of the following is true as a result of the dead air space of the respiratory tract?
The carbon dioxide content of the air inside the lungs is always HIGHER than the outside air.
The chemoreceptors in the carotid and aortic bodies are most sensitive to changes in blood
The portion of the respiratory center that is responsible for establishing the basic pattern of breathing is the
The effects of carbon dioxide and hydrogen ions on the respiratory center are similar because
1. CARBON DIOXIDE combines with water to form 2. CARBONIC ACID.
The vocal cords are located within the
The respiratory membrane consists of
TWO thicknesses of epithelial cells AND basement membranes.
The amount of oxygen released from oxyhemoglobin increases when
carbon dioxide concentration INCREASES.
The enzyme carbonic anhydrase causes
CARBON DIOXIDE to react with WATER.
Of the respiratory air volumes listed, which one has the largest volume?
The intensity (volume) of a vocal sound is a result of the
FORCE OF AIR PASSING OVER the vocal cords.
Which of the following proteins is the most important physiologically in the transport of carbon dioxide by blood?
If a flashlight is placed just below the eyebrow in a darkened room, it may be possible to illuminate the
Laryngitis is a potentially dangerous condition because it may cause
OBSTRUCTION of the AIRWAY
The procedure used to directly examine the trachea and bronchial tree is called
The condition of newborns called respiratory distress syndrome is caused by a
a lack of SURFACTANT
The visceral and parietal pleural membranes are normally held together by
The condition in which air enters the pleural cavity is called
Which of the following air volumes cannot be measured using a simple spirometer?
The most sensitive areas of the air passages are located in the
larynx and bronchi.
Bronchial asthma is a condition caused by
During an asthma attack, the patient usually finds it most difficult to
Cancer that originates in the lungs is most likely to develop from
The volume of air that enters (or leaves) during a single respiratory cycle is termed
Carbon dioxide is sometimes added to the air that a patient breathes in order to
INCREASE BOTH the rate and depth of breathing.
Hyperventilation is most likely to be accompanied by a(n)
DECREASE in blood CO2 concentration and a RISE in pH.
During moderate physical exercise, blood concentrations of
Both oxygen and carbon dioxide REMAIN NEARLY UNCHANGED
The pharynx functions as a ______, whereas the larynx functions as a ______.
common passageway for AIR AND FOOD
passageway for AIR ONLY
Changes in the structure of the respiratory tube as the branches become finer include the
epithelial lining changes from pseudostratified ciliated columnar to cuboidal and simple squamous.
The right lung is composed of ______ lobes; the left lung is composed of ______ lobes.
superior, middle, and inferior
superior and inferior
The first event in inspiration is
the diaphragm moves downward and the external intercostal muscles contract.
The first event in expiration is
the diaphragm and external respiratory muscles relax.
Increasing blood concentrations of carbon dioxide and hydrogen ions have similar effects upon the respiratory center due to
an increase in CARBON DIOXIDE, thereby resulting in an increase in HYDROGEN IONS.
The organs of the upper respiratory tract are located
outside the thorax.
The glottis is the
opening between the vocal cord.
Ordinary air is about _____ oxygen and _____ nitrogen.
Carbon monoxide bonds to _______ more effectively than does oxygen.