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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


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