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Respiratory System Questions
Question # 1 Food and drink are prevented from entering the respiratory passageways during swallowing by means
of the
A) glottis.
B) pharynx.
C) epiglottis.
D) larynx.
E) trachea.
Question # 2 What is the proper sequence in the flow of air in humans?
A) nasal cavities, larynx, pharynx, bronchi, trachea
B) nasal cavities, pharynx, bronchi, larynx, trachea
C) nasal cavities, pharynx, larynx, trachea, bronchi
D) nasal cavities, larynx, pharynx, trachea, bronchi
E) nasal cavities, bronchi, larynx, trachea, pharynx
Question # 3 Which of the following is NOT a function of the nasal cavities?
A) Filter dust out of the incoming air.
B) Detect odors.
C) Warm the air.
D) Oxygenate the blood.
E) Moisturize the air.
Question # 4 What is the name given to the respiratory ailment in which the bronchioles constrict severely?
A) pleurisy
B) emphysema
C) bronchitis
D) laryngitis
E) asthma
Question # 5 The last mammalian structure that air moves through before the alveoli is the
A) larynx.
B) glottis.
C) bronchioles.
D) trachea.
E) pharynx.
Question # 6 The lungs move easily within their protective sacs due to
A) intrapleural fluid.
B) leaking plasma.
C) blood.
D) mucus.
E) both b and d
Question # 7 Actual exchange of gases in the lungs occurs in the
A) bronchi.
B) alveoli.
C) bronchioles.
D) tracheas.
E) glottis.
Question # 8 In describing the parts of the respiratory system, the word "septum" designates a partition in the
A) larynx.
B) nasal cavities.
C) pharynx.
D) glottis.
E) lungs.
Question # 9 When you swallow, the epiglottis covers the opening to the
A) pharynx.
B) esophagus.
C) larynx.
D) bronchus.
E) alveoli.
Question # 10 In pleurisy,
A) some of the alveoli fill with fluid.
B) the pleural membrane becomes inflamed and swollen and causes painful breathing.
C) the diaphragm develops muscular cramps.
D) the vagus nerve is irritated
E) the intercostal muscles become inflamed and cause pain during deep breathing.
Part II:
Question # 1 The concentration of nitrogen in the earth's atmosphere is approximately
A) 78 percent.
B) 66 percent.
C) 50 percent
D) 33 percent
E) 20 percent.
Question # 2 The oxygen content of air is approximately
A) 21 percent.
B) 78 percent.
C) 0.04 percent
D) 0.96 percent.
E) 100 percent.
Question # 3 The atmospheric pressure at sea level is
A) 1,000mm Hg.
B) 760mm Hg.
C) 540mm Hg.
D) 400mm Hg.
E) 320mm Hg.
Question # 4 The movement of both oxygen and carbon dioxide in the body is accomplished by
A) exocytosis and endocytosis
B) bulk flow.
C) osmosis
D) diffusion.
E) facilitated diffusion
Question # 5 Which vertebrate body system is most closely associated functionally with respiration?
A) urinary
B) digestive
C) endocrine
D) circulatory
E) integumentary
Question # 6 The concentration of carbon dioxide in the earth's atmosphere is
A) 0.004 percent.
B) 0.04 percent.
C) 0.4 percent
D) 4.0 percent.
E) 40 percent.
Question # 7 The most abundant gas in the earth's atmosphere is
A) oxygen.
B) water vapor
C) argon.
D) nitrogen.
E) carbon dioxide
Question # 8 For the surface of an animal to function in the integumentary exchange of gases it must
A) be thin and soft.
B) have a high number of blood vessels
C) have mucus or moist covering
D) all of the above
Question # 9 Exchange across a membrane requires
A) moisture.
B) transport proteins
C) pressure gradients.
D) a and c only
E) a, b, and c
Part III:
Question # 1 During inhalation,
A) the pressure in the thoracic cavity is greater than the pressure within the lungs.
B) the pressure in the thoracic cavity is less than the pressure within the lungs.
C) the diaphragm moves upward and becomes more curved.
D) the chest cavity volume decreases.
E) all of the above
Question # 2 The maximum amount of air that can be taken into the lungs in a single deep breath is the
A) vital capacity.
B) tidal volume
C) pleural volume.
D) alveolar volume.
E) inspirational capacity
Question # 3 During inhalation,
A) the pressure in the thoracic cavity is greater than the pressure within the lungs.
B) the pressure in the thoracic cavity is less than the pressure within the lungs.
C) the diaphragm moves upward and becomes more curved.
D) the chest cavity volume decreases.
E) all of the above
Question # 4 The amount of air that moves into and out of the human lungs in each normal breath is termed
A) inspirational capacity.
B) reserve volume.
C) pleural volume.
D) alveolar volume
E) tidal volume.
Question # 5 Which of the following is NOT found in lung tissue?
A) blood capillaries
B) alveolar sacs
C) interstitial fluid
D) connective tissue
E) muscle
Question # 6 In humans ventilation is powered by
A) the diaphragm.
B) muscles attached to the ribs
C) the lungs themselves.
D) only a and b
E) all of the above
Question # 7 The human vocal cords are located in the
A) glottis.
B) pharynx.
C) trachea.
D) larynx.
E) bronchus
Part IV:
Question # 1 Which statement is NOT true?
A) Carbon dioxide is more soluble in fluid than in oxygen.
B) Carbon dioxide diffuses more rapidly across the respiratory surface than does oxygen.
C) The major muscle involved in breathing is the diaphragm.
D) Oxygen is carried primarily by blood plasma
E) Carbon dioxide is carried by the blood plasma
Question # 2 The enzyme responsible for converting free carbon dioxide in the blood into forms in which it can be
transported in the blood is
A) carbonic anhydrase.
B) carboxypeptidase.
C) carbonase.
D) decarboxylase.
E) dehydrogenase.
Question # 3 Most of the carbon dioxide produced by the body is transported to the lungs in
A) a gaseous form
B) blood plasma.
C) potassium carbonate ions.
D) bicarbonate ions.
E) carbonic acid.
Question # 4 Which of the following statements is false?
A) Hemoglobin functions as a buffer
B) Bicarbonate ions tend to diffuse out of red blood cells into the blood plasma.
C) The movement of molecules is in different directions in the metabolically active tissues and the
alveoli.
D) Carbonic anhydrase is an enzyme that promotes the formation of oxyhemoglobin.
Question # 5 Carbonic anhydrase
A) combines with water to form carbonic acid
B) dissociates into bicarbonate and hydrogen ions.
C) is normally found in red blood cells.
D) is responsible for maintaining the high levels of carbon dioxide in the lungs and the low levels of
carbon dioxide in the body tissues.
E) all of the above
Question # 6 Hemoglobin
A) tends to release oxygen under warmer temperatures
B) picks up more oxygen the higher its partial pressure.
C) picks up more oxygen when it is saturated
D) will give up oxygen when the partial pressure of oxygen is higher than it is in the lungs.
E) both a and b
Question # 7 Hemoglobin gives up O2 when
A) carbon dioxide concentrations are high
B) body temperature is lowered.
C) pH values are high
D) CO2 concentrations are low
E) all of the above
Question # 8 Oxygen moves from alveoli to the bloodstream
A) because the concentration of oxygen is greater in alveoli than in the blood.
B) mainly due to the activity of carbonic anhydrase in the red blood cells.
C) by using the assistance of carbaminohemoglobin
D) through active transport.
E) all of the above
Question # 9 Hemoglobin
A) tends to give up oxygen in regions where partial pressure of oxygen exceeds that in the lungs.
B) tends to hold onto oxygen when the pH of the blood drops.
C) tends to release oxygen where the temperature is lower.
D) releases oxygen more readily in highly active tissues.
E) all of the above
Part V:
Question # 1 Exhaling into a paper bag and rebreathing the exhaled air would be expected to
A) alert the brain.
B) increase the breathing rate.
C) stimulate the carotid bodies.
D) b and c only
E) a, b, and c
Question # 2 The rate and depth of breathing are governed by
A) chemoreceptors in arterial walls.
B) baroreceptors in the diaphragm
C) the partial pressure of O2 in the atmosphere
D) a respiratory center in the brainstem
E) all of the above except b
Question # 3 Which statement is true?
A) Breathing rate and depth are completely under voluntary control.
B) A person can commit suicide by holding one's breath.
C) The contraction of the diaphragm and muscle of the rib cage are under the control of areas of the
brain.
D) There are chemoreceptors in the brain that monitor carbon dioxide content in the blood and control
breathing.
E) both c and d
Part VI:
Question # 1 Although carbon dioxide is normally carried by hemoglobin, the fact that carbon monoxide reduces
hemoglobin's oxygen-carrying capacity would indicate that
A) different hemoglobins carry different gases.
B) carbon monoxide competes with oxygen for the same binding sites on hemoglobin.
C) binding of different gases is directed by a variety of enzymes.
D) carbon dioxide is an abnormal gas.
Question # 2 Hypoxia
A) causes hyperventilation
B) may cause headaches, nausea, and lethargy.
C) can lead to loss of consciousness and death
D) may be the result of changes in altitude
E) all of the above
Question # 3 Smoking has been shown to cause
A) bronchitis.
B) emphysema.
C) lung cancer.
D) coronary disease.
E) all of the above
Question # 4 Life-long nonsmokers live an average of how much longer than those who, in their mid-twenties,
smoked two packs of cigarettes a day?
A) 6 months
B) 1-2 years
C) 3-5 years
D) 7-9 years
E) over 12 years
Question # 5 Decompression sickness is caused by
A) a rapid rise of carbon dioxide in the blood.
B) lack of oxygen in the tissues
C) bubbles of nitrogen in the blood
D) glucose deficiency.
E) descending too rapidly into deep water
Question # 6 Carbon monoxide
A) has a very low affinity or attraction to hemoglobin.
B) is unlikely to be transported by the circulatory system.
C) is not the cause of death of people who breathe excessive amounts of automobile exhausts.
D) can arise from cigarette smoke
E) both c and d
Question # 7 The cessation of smoking
A) can reduce the risk of stillbirth
B) reduces the chances of cancer
C) reduces the chances of coronary disease
D) improves lung functioning
E) all of the above