44 terms

Chapter 22

Which of the following is not a function of the respiratory system?
it assists in the synthesis of vasodilators
The upper respiratory tract extends
from the nose through the larynx
The nose is divided into right and left halves termed the
nasal fossae
Which two ligaments extend from the thyroid cartilage to the arytenoid cartilages
vestibular and vocal ligaments
The most numerous cells in the lungs are called
dust cells
Each alveolus is surrounded by a basket of blood capillaries supplied by
the pulmonary artery
Which of the following does not have cilia
respiratory bronchioles
What is the basic distinction between an alveloar duct and an alveolar atrium
their shape
Crude sounds are formed into intelligible speech by all of the following except
the epiglottis
Which of the following cartillage is largest
the thyroid cartilage
_____ states that the total pressure of a gas mixture is equal to the sum of the partial pressure of it's individual gases
Dalton's Law
In a healthy person which of the following will have the greatest influence on resistance to pulmonaryairflow
bronchiole diameter
The amount of air in excess of tidal volume that can be inahled with maximum effort is called
inspiratory reserve volume
Vital capacity consists of
expiratory reserve volume + tidal volume + inspiratory reserve volume
Deep, rapid breathing often seen in terminal diabetes mellitus is known as what
Kussmaul respiration
Carbon dioxide is transported by all of the following means except
Tom is in respiratory arrest due to an electrical shock. Why does a good samaritan have up to 4 to 5 minutes to begin CPR and save Tom's life?
a venous reserve of oxygen in Tom's blood
During exercise which of the following directly increases respiratory rate
anticipation of the needs of exercising muscle
Which of the following would slow down gas exchange between the blood and alveolar air
an increase in membrane thickness
The addition of CO2 to the blood generates____ ions in the RBC's, which in turn stimulates RBC's to unload more oxygen
Which of the following has no effect on oxyhemoglobin dissociation
erythrocyte count
Which has the highest concentration in the air we breathe
Each hemoglobin molecule can transport up to _____ oxygen molecules
Normally the systemic arterial blood has a PO2 of ____mmHg, a Pco2 of _____ mm Hg and a pH of _____.
95; 40; 7.4
Which of the following enzymes in an RBC breaks H2CO3 down to water and carbon dioxide
carbonic anhydrase
In one passage through a bed of systemic blood capillaries, the blood gives up about what percentage of it's oxygen
20% to 25%
Which of the following is the term for a deficiency of oxygen or the inability to utilize oxygen in a tissue
Congestive heart failure results in which of the following
ischemic hypoxia
_____ is a lung disease marked by s reduced number of cilia, reduced motility of the remaining cilia, goblet cell hypertrophy and hyersecretion and thick sputum
chronic bronchitis
Which of the following would lead to anemic hypoxia
sickle-cell disease
A lung disease marked by abnormally few but large alveoli is
In _____ the lungs are infected with mycobacterium and produce fibrous nodules around the bacteria, leading to progressive pulmonary fibrosis
Which malignancy originates in the lamina propria of the bronchi
Polio can sometimes damage the brainstem respiratory centers and result in
Ondine's curse
Which of these is most likely to result from contact between contaminated fingers and the nasal mucosa
acute rhinitis
Scuba divers breathe a nitrogen-oxygen mixture rather than pure compressed oxygen in order to avoid
oxygen toxicity
Nitrogen bubbles can form in the blood and other tissues when a scuba diver ascends too rapidly producing a syndrome called
pulmonary barotrauma
The vagus and glossopharyngeal nerves carry afferent signals from peripheral chemoreceptors to a chemosensitive area in
the medulla oblongata
Mucus plays an important role in cleansing inhaled air. It is produced by ____ of the respiratory tract
goblet cells
The blood transports more CO2 in the form of _____than in any other form
bicarbonate ions
Among its other purposes the Valsalva maneuver is used
to aid in defecation and urination
Blood banks dispose of blood that has low levels of bisphoglycerate. What would be the probable reason for doing so?
erythrocytes low in BPG do not unload O2 very well
Your breathing rate is 12 breaths/minute; your tidal volume is 500 ml; your vital capacity is 4700ml; and your dead air space is 150 ml. Your alveolar ventilation rate is ___ ml/min
Your breathing rate is 14 breaths/minute;spirometric measurements reveal your tidal volume is 500 ml;your inspiratory reserve volume is 3000 ml; and your expiratory reserve volume is 1200ml. Your vital capacity is ___ ml