h phys exam IV--spring 2011--answer key

h phys exam IV--spring 2011--answer key - Name: Trask Zool...

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Name: 1 | Page Trask Zool 2200: Human Physiology Exam 4 04/18/11 Section I: Multiple Choice Section I: Multiple Choice. Answer each of the following questions by filling in the circle on your answer key that corresponds with the BEST answer. (40 points total ) 1.) The intercostals muscles contract pulling the rib cage upward and outward causing the lungs to inflate. This happens during: a.) inspiration b.) expiration c.) exhalation d.) deflation 2.) The volume of air that remains in the lungs after a normal exhalation is: a.) the tidal volume b.) the expiratory reserve volume c.) the residual volume d.) functional residual capacity 3.) The enzyme responsible for conversion of CO 2 to bicarbonate is: a.) carboxykinase b.) creatine phosphatase c.) carbonic anydrase d.) carboxylase e.) oxycarbinase 4.) Which of the following is not a function of the human respiratory system? a.) elimination of wastes b.) regulation of pH c.) vocalization d.) temperature regulation 5.) A person with a stuffy nose would diminish: a.) filtration capacity of incoming air. b.) the ability to humidify incoming air. c.) the temperature of air reaching the alveoli. d.) alveolar pO 2 . e.) all of the above. f.) only a., b. and c.
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2 | Page 6.) A sharp blow to the stomach can “knock the wind out of you.” This temporarily paralyzes the diaphragm making it hard to take a full breath. Aside from a lack of oxygen making you pass out, what effect would this have on blood pH? a.) O 2 would build up in the blood, making it more basic. b.) CO 2 would build up in the blood, making it more basic. c.) O 2 would build up in the blood, making it more acidic. d.) CO 2 would build up in the blood, making it more acidic. 7.) At the tissues, O 2 and CO 2 diffuse through: a.) small arteries. b.) small veins. c.) arterioles. d.) capillaries. 8.) Expired air will contain than (or as) inspired air. a.) less O 2 but more CO 2 b.) less O 2 and less CO 2 c.) more O 2 and more CO 2 d.) more O 2 but less CO 2 e.) the same amount of O 2 and CO 2 9.) What factor(s) make it difficult for a person with emphysema to exhale? a.) The diaphragm does not relax. b.) Bronchioles are constricted. c.) The lungs do not recoil. d.) Diffusion distance for CO 2 is increased. 10.) In humans, the lungs inflate because of: a.) contraction of muscles in the lungs. b.) contraction of the diaphragm and rib cage. c.) relaxation of the abdomen. d.) high atmospheric pressure. 11.) The rate of respiration is chiefly dependent upon: a.) O 2 concentrations in the blood. b.) CO 2 concentrations in the blood. c.) Hemoglobin concentrations in the blood. d.) both a. and b. e.) a., b., and c.
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3 | Page 12.) Breathing becomes more difficult at higher altitudes because: a.) air weighs less b.) pO 2 is less c.) pCO 2 is higher d.) pH 2 O is greater 13.) Which of the following gases has a lower pressure in the tissues? a.) O
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h phys exam IV--spring 2011--answer key - Name: Trask Zool...

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