PHYSIOLOGY 452 552 EXAMINATION 3 Thursday April 24th 2008 INSTRUCTIONS This examination consists of 35 multiple choice questions 8 disit UB person number clearly on the answer sheet Fill in corresponding circles on the answer sheet Also print your name and either 452 or 552 on the answer side of scantron Please print your name and Please mark your answers carefully on the answer sheet with a 2 pencil IMPORTANT NOTE IF YOU ERASE DO SO COMPLETELY There is only one best answer for each question This exam consists of 9 pages including this cover page and 35 questions Please check that your copy has all pages All questions caffy equal weight read the questions carefully You may keep the examination for study Answers will be posted as soon as possible on UBlearns Be sure to make a list of your answers before leaving the exam room so that you can grade yourself on this exam TURN OFF ALL CELL PHONES ANYONE WHO ANSWERS A CELL PHONE DURING THE EXAM WILL RECEIVE A ZERO O FOR THE EXAM CHEATING ON EXAMS In an effort to decrease the temptation to cheat on hourly and final exams we ask that you follow the procedures listed below 1 2 3 4 Keep your answer sheet covered except when adding an answer Please inform one of the instructors as soon as possible if you suspect someone is cheating Your comments will be kept confidential Remember that according to University policy a person giving answers is equally as guilty as a person receiving answers The ultimate penalty for cheating is dismissal from the University The version of YOUR exam is VERSION 2 On side two of your answer sheet scantron there is a Grade or Education box below the Identification box where you add your student number In this Grade or Education box fill in circle 2 If you do not add your exam version you will receive azero 0 for this exam If you fill in the WRONG number you will be scored for the number you fill in This is your responsibility only If you fill in the wrong number it cannot be changed after you turn in your exam Choose the one BEST answer for questions 1 20 1 Which of the following will decrease blood flow perfusion through the lung A A decrease in pulmonary vascular resistance PVR B A decrease in the arterial to venous pressure gradient AP C An increase in blood pressure within the pulmonary artery D OnlyA Baretrue E A B Caretrue 2 In a person with emphysema A RV increases because of a decrease in lung compliance B RV increases due to flow limitation that causes air trapping C FRC increases because of an increase in lung recoil pressure D OnlyA Baretrue E A B Caretrue 3 In a person whose spinal cord is severed cut at the level of C7 A inspiration will be completely normal B expiration will C occur primarily via passive recoil of the chest wall the ability to cough will be decreased D OnlyA Baretrue E A B Caretrue I 4 In a person with pulmonary fibrosis A expired ventilation l e I must increase in order to maintain normal alveolar ventilation te O I B diffusion of oxygen across the alveolm capillary membrane decreases C FRC decreases because lung recoil pressure decreases D OnlyA Baretrue I I E A B Caretrue I 5 In a person with a pulmonary embolism I I A alveolar dead space increases I aa B the V A 8 C ratio decreases the Pa62 increases I D OnlyA Baretrue I E A B Caretrue I I I 6 The P4e2 is less than the P162 because I A water vapor prescure increases during inspiration I I I I B oxygen is constantly diffusing into the pulmonary capillaries C the Pacot is greater than the Ptcor D OrIyA Baretrue E A B Caretrue I I I i 7 Paoz will be less than normal if A the Dl6sdecreases B alveolar dead space increases C shunt increases D OnlyA Baretrue n A B Caretrue 8 Which of the following A The sol layer statements is FALSE in the conducting zone airways is maintained by the movement of ions and fluid across the apical membrane of ciliated epithelial cells B Airway smooth muscle contracts when acetylcholine is released from parasympathetic neurons C Only D sympathetic neurons innervate the subepithelial mucus glands Gas exchange does not occur in these airways E Prolonged cigarette smoking decreases movement of the cilia and causes an increase in the number of goblet cells 9 aa The overall V AIQ ratio of the lung can be altered by A changes in alveolar dead space B changes in the amount of extrapulmonary shunt C rnoving from standing to the lying down position D OnlyA Baretrue f A B Caretrue 10 Which of the following statements is FALSE with regard to the diffusion of 02 auoss the alveolar capillary membrane A At rest most of the diffusion occurs within the first one third of the pulmonary capillary B During exercise D 62 increases due to recruitment of pulmonary capillaries C The D162 c n be measured directly by having you inhale air with different Pror s D The Drc2 will increase if the Proz increases tr If the D66 increases then the Droz will increase 1 1 The partial pressure A equal to of Oz in the pulmonary veins is 100 mmHg in a normal individual B less than 100 mmHg in a person with an extrapulmonary C greater than 100 mmHg if Proz increases shunt to 250 mmHg in a normal individual D OnlyA Baretrue E A B Caretrue 12 Which of the following will decrease the O2 carrying capacity of hemoglobin in venous blood A A decrease in the Poz B An increase in the Pcoz C An increase in the H D OnlyA Baretrue E A B Caretrue 13 As blood moves through the pulmonary capillaries A the HCO3 decreases B The amount of dissolved C COz decreases The amount of Hbs62 increases D OnlyA Baretrue E A B Caretrue 14 In a person with emphysema an inoease in the P162may cause all of the following EXCEPT A A decrease in hypoxic B An increase pulmonary vasoconstriction in the P6s2 C An increase in the Droz D An increase in the number of alveoli E A decrsased thickness 15 of the alveolar capillary membrane In a normal individual at sea level all of the following occur during exercise EXCEPT A recruitment of pulmonary capillaries B an increase in the surface area of the alveoli C a marked increase D an increase in the 02 driving pressure across the lung in the C6s2 E an increase in the D162 16 After prolonged weeks exposure to high altitude A the Ca62 teturns toward normal B the Hb increases C Oz saturation of hemoglobin returns to normal D OnlyA Baretrue E A B Caretrue 17 Erythropoetin A increases due to a decrease in the Pacoz B increases the number of red blood cells C increases the amount of dissolved Oz D OnlyA Baretrue E A B …