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Respiratory Test

Multiple Choice

Microorganisms removed from incoming air by sticky mucus are most likely to be destroyed by C. digestive action in gastric juice
The vocal cords are located within B. larynx
Force that causes air to move into lungs during inspiration is supplied by D. atmospheric pressure
The force responsible for normal expiration is supplied by C. elastic recoil of tissues and surface tension
Amount of air that enters or leaves lungs during normal respiratory cycle is A. tidal volume
Enzyme carbonic anhydrase causes A. Carbon dioxide to react w/ water
Which of following muscles would be most helpful for forceful expiration? C. abdominal wall muscles
During forceful expiration, air that can be expelled from lungs in addition to tidal volume is called A. expiratory reserve volume
Breathing rate is most likely to increase if blood concentration of B. carbon dioxide increases
Microorganisms trapped in mucus of nasal cavity are most likely to be transported to C. stomach
Gas exchange btwn air in alveoli and blood in nearby capillaries occurs primarily by A. diffusion
Laryngitis is potentially dangerous condition bc it may cause B. obstruction of airway
Condition of newborns called respiratory distress syndrome is caused by A. lack of surfactant
Visceral and parietal pleural membranes are normally held together by C. surface tension
Emphysema is characterized by an increase in D. None of the above
Cancer that originates in lungs is most likely to develop from A. epithelial cells
Procedure used to directly examine trachea and bronchial tree is called A. bronchoscopy
Which of following are volumes that cannot be measured using simple spirometer? C. Residual volume
CO2 is sometimes added to air that patient breathes in order to B. increase rate and increase depth of breathing
Hyperventilation is most likely to be accompanied by B. decrease in blood CO2 concentration and rise in pH
Internal respiration is at level of B. cell
Depth of breathing is regulated by inflation reflex. Rate of breathing is regulated by chemistry of your blood as it interacts w/ D. Medulla oblongata
The driving force behind gas exchange in body is B. air pressure
Which is correct sequence for path of oxygen through respiratory system D. Nasal passages, trachea, bronchi, bronchioles, alveoli, blood, cells
Carbon dioxide dissolves in blood as carbonic acid, but is so unstable it immediately breaks down into C. bicarbonate ions and hydrogen ions
Which of these laryngeal cartilages occurs singly rather than in pairs? A. Cricoid
Pitch of vocal sound is controlled by changing B. tension on vocal cord
Chemoreceptors in carotid and aortic bodies are most sensitive to changes in blood C. oxygen concentration
Portion of respiratory center that is responsible for establishing basic pattern of breathing is B. Medullary rhythmicity
Effects of CO2 and hydrogen ions on respiratory center are similar bc D. CO2 combines w/ water to form carbonic acid
Amount of oxygen released from oxyhemoglobin increases when B. Carbon dioxide concentration increases
Of respiratory air volumes listed, which one has largest volume? C. vital capacity
Which of following proteins is most important physiologically in transport of CO2 by blood? B. Carbonic anhydrase
Exercise can trigger symptoms of Acute Mountain Syndrome due to which of the following? B. Low atmospheric pressure
The pharynx functions as a ________, whereas the larynx functions as a _______. C. Common passageway for air and food; passageway for air only
Trachea can be described as D. All of the above (A. lined w/ ciliated mucous membrane, B. including about 20 c-shaped cartilage rings, C. passageway for air)
Mucous membrane lining nasal cavity functions to D. All of the above (A. warm incoming air, B. moisten incoming air, C. entrap dust and other small particles)
During moderate physical exercise, blood concentrations of B. Oxygen and CO2 remain nearly unchanged
First event in inspiration is A. diaphragm moves downward and external intercostals muscles contract
Increasing blood concentrations of CO2 and hydrogen ions have similar effects upon respiratory center due to C. increase in CO2, thereby resulting in increase in hydrogen ions
When person exhales, atmospheric pressure in lungs is lower than that outside of body bc volume in lungs has decreased. This results in outside air pushing into lungs. This relationship is termed C. Boyle's Law
Dorsal respiratory group and ventral group are found extending throughout which structure: C. Medulla oblongata
Which of following factors does not directly affect breathing rate? C. Degree of lung tissue stretch
Oxyhemoglobin forms by chemical reaction btwn which of following? C. Hemoglobin and oxygen
Gas moves from area _________ partial pressure to area of _________ partial pressure. D. high; low
Created by: mpiontek