Biology 12
Provincial Exam Questions
Unit: Human Anatomy, Respiratory (C8,9,&10)
2010 Jan
36. Which of the following moves mucus in the respiratory system?
A. cilia
B. alveoli
C. pharynx
D. diaphragm
37. During inhalation, air moves from the nose directly into the
A. alveoli.
B. bronchi.
C. pharynx.
D. bronchioles.
38. Blood moving away from this structure has a high concentration of
A. oxyhemoglobin.
B. bicarbonate ions.
C. reduced hemoglobin.
D. carbaminohemoglobin.
39. Which of the following is not produced as a result of external respiration?
A. water
B. carbon dioxide
C. oxyhemoglobin
D. bicarbonate ions
40. If the pleural membranes are punctured,
A. the alveoli expand.
B. the epiglottis closes.
C. a lung may collapse.
D. pressure decreases in the thoracic cavity.
41. Which structure responds to nervous stimulation from the medulla oblongata?
A. W
B. X
C. Y
D. Z
42. Where is the concentration of reduced hemoglobin the greatest?
A. W
B. X
C. Y
D. Z
2009 Sample
22. What traps particles and moves them up the trachea?
A. villi and mucus
B. mucus and cilia
C. alveoli and villi
D. cilia and alveoli
23. Which of the following substances, formed during internal respiration, counteracts a decrease in blood pH?
A. oxyhemoglobin
B. carbonic anhydrase
C. reduced hemoglobin
D. carbaminohemoglobin
24. Which of the following pairs of reactions occurs most frequently in the blood surrounding the structure shown?
A. Hb+O2HbO2 and HHbHb+H+
B. HbO2Hb+O2 and Hb+H+HHb
C. H++HbHHb and H2CO3HCO3+H+
D. CO2+H2OH2CO3 and H2CO3HCO3+H+
2009 June
48. During inhalation, air moves from the bronchioles into the
A. larynx.
B. alveoli.
C. trachea.
D. bronchi.
49. Voice sounds are produced in the
A. larynx.
B. trachea.
C. bronchi.
D. pharynx.
50. Which structure responds to nerve impulses from the medulla oblongata?
A. W
B. X
C. Y
D. Z
51. Consider the following reaction: CO2 + H2OH+ + HCO3–
Which of the following occurs as a result of an increase in the rate of this reaction?
A. decreased activity in the aortic bodies
B. decreased stimulation of the diaphragm
C. increased rate of contraction of the rib muscles
D. increased concentration of carbonic anhydrase in the blood
3. Describe how the diaphragm and rib cage function to change the pressure in the thoracic cavity during inhalation. (3 marks)
2008 Aug
42. Between which of the following does external respiration occur?
A. the alveoli and the lung capillaries
B. the tissue fluid and the tissue cells
C. the mitochondria and the cytoplasm
D. the tissue capillaries and the tissue fluid
43. Which letter indicates the trachea?
A. W
B. X
C. Y
D. Z
44. What is the correct order of the events above?
A. 2 1 3 5 4
B. 2 3 5 1 4
C. 5 1 2 3 4
D. 5 1 3 4 2
45. Most of the carbon dioxide produced during exercise returns to the lungs as
A. bicarbonate ions.
B. reduced hemoglobin.
C. carbaminohemoglobin.
D. dissolved carbon dioxide.
46. What two substances combine in the blood resulting in a decrease in pH?
A. oxygen and hemoglobin
B. carbon dioxide and water
C. hemoglobin and fibrinogen
D. carbonic anhydrase and carbon dioxide
47. At which area is the concentration of oxyhemoglobin the greatest?
A. W
B. X
C. Y
D. Z
48. The release of oxygen from hemoglobin at the tissues is facilitated by a decrease in
A. pH.
B. temperature.
C. hydrogen ions.
D. bicarbonate ions.
2007 Aug
44. Rings of cartilage surround which of the following structures?
A. the alveoli
B. the bronchi
C. the pharynx
D. the bronchioles
45. What structure is lined with cilia?
A. the trachea
B. the pharynx
C. the epiglottis
D. the pleural membranes
46. What structures increase the surface area in the lungs?
A. the villi
B. the alveoli
C. the bronchi
D. the pleural membranes
47. Which of the following causes a drop in the air pressure within the thoracic cavity?
A. The rib cage moves up and out.
B. Air moves into the thoracic cavity.
C. The diaphragm becomes dome shaped.
D. The medulla oblongata sends fewer nerve impulses.
48. What is a characteristic of the blood in vessel Y if it is carrying blood toward X?
A. The concentration of oxyhemoglobin is high.
B. The concentration of bicarbonate ions is high.
C. The concentration of reduced hemoglobin is low.
D. The concentration of carbaminohemoglobin is low.
49. Which of the following is a characteristic that aids in the function of structure X?
A. They have lipoproteins to prevent collapse.
B. They have cilia and mucus to remove debris.
C. They have a two or three cell layer thickness to provide strength.
D. They have a low surface-area-to-volume ratio to allow for quick exchange of gases.
50. How does the body respond to increased concentration of carbon dioxide in the blood?
A. Activity in the medulla oblongata decreases.
B. Rate of contraction of the rib muscles increases.
C. Number of impulses sent to the diaphragm decreases.
D. Secretion of hormones from the hypothalamus increases.
2006 Aug
45. What structure closes the trachea when a person swallows?
A. the glottis
B. the larynx
C. the pharynx
D. the epiglottis
46. Which of the following occurs during inhalation?
A. The intercostal muscles relax and the diaphragm relaxes.
B. The intercostal muscles relax and the diaphragm contracts.
C. The intercostal muscles contract and the diaphragm relaxes.
D. The intercostal muscles contract and the diaphragm contracts.
47. What part of the brain controls inhalation?
A. the cerebrum
B. the cerebellum
C. the corpus callosum
D. the medulla oblongata
48. Which of the following decreases as carbon dioxide enters the blood during internal respiration?
A. water
B. hydrogen ions
C. bicarbonate ions
D. reduced hemoglobin
4. Describe the conditions in the blood that cause the medulla oblongata to increase the rate of contraction of the diaphragm. (3marks)
2005 Aug
45. In which area do voice sounds originate?
A. V
B. W
C. X
D. Y
46. What is the structure labelled W?
A. the larynx
B. the alveoli
C. the trachea
D. the bronchi
47. What structure prevents food from entering the respiratory system?
A. U
B. X
C. Y
D. Z
4. Explain three ways in which the alveoli are well suited to their function.(3 marks)
1
2010 Compiled from provincial exams