BIO 2400 Final Exam Questions And Answers

BIO 2400 Final Exam Questions And Answers During inspiration - ANS more volume is created by upward movement of ribs and sternum If the following conditions occurred,(decreased pH, increased temperature, increased PCO2) which of the following would result ? - ANS increased release of O2 from hemoglobin Which of the following would NOT occur at the lungs ? - ANS H+ kicks off hemoglobin Air moves into the lungs when - ANS A larger volume is created Hemoglobin would reduce its affinity for O2 in which of the following cases? - ANS All of the answers are correct ( low tissue PO2, increased temperature, increased PCO2, decreased pH) Which of the following would cause a decrease in the binding affinity of hemoglobin for oxygen ? - ANS increased temperature of the blood Which of these correctly describes the chloride shift ? - ANS In the lungs, chloride enters red blood cells in exchange for bicarbonate ions After CO2 is produced by tissues, in what form is most of that carbon transported to the lungs for removal from the body? - ANS As dissolved HCO3- More additional oxygen binds to hemoglobin when going from a PO2 of 60 to 100 mmHg, than is added when going from a PO2 of 40 to 60 mmHG - ANS false At normal resting systemic arterial PO2, hemoglobin is almost 100% saturated with oxygen - ANS True If all other factors remain the same, which of these results in a n increase in the amount of oxygen bound to hemoglobin ? - ANS Increased plasma [H+] In which form is most of the oxygen carried in arterial blood ? - ANS Bound to hemoglobin You embark on a hiking trip on Mt. Kilimanjaro (altitude= 19,000 ft; Atmospheric air pressure= 379 mmHg.). mHg). As you ascend, what are you likely to notice about your breathing ? - ANS You need to work harder to inhale, expanding your thoracic size beyond what is normal Which of these causes inhalation/inspiration ? - ANS Flattening (downward movement) of the diaphragm