BIO 270 HYND EXAM 3 STUDY GUIDE SOLUTIONS

BIO 270 HYND EXAM 3 STUDY GUIDE SOLUTIONS (T/F) The O2-Hb dissociation curve is static - ANSWER-False, it is not static Steep between "20-60" Flat between "60-100" ______________ is the main determinant of # of Hb binding sites - ANSWER- What component of hemoglobin actually binds the oxygen? - ANSWER-Fe+ Since the blood goes leaves the lungs with pO2 =100, what does this mean for its affinity? - ANSWER- Almost fully saturated (around ~ 97%) What does the plateau portion of the O2-Hb curve tell you? - ANSWER-Hb is almost fully saturated If there is a drop in O2, they will still be almost completely saturated until 60mmHg when the graph gets steep ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/14 Methods of Gas Transport in the Blood: O2: 2 steps Dissolved-1.5% Bound to Hemoglobin-98.5% CO2: 3 steps Dissolved-10% Bound to Hemoglobin-30% As Bicarbonate- 60% - ANSWER-KNOW NUMBERS _________________ ___________ catalyzes this reaction (H2CO3) in the RBC's - ANSWER-Carbonic Anhydrase What law explains why soda goes flat? - ANSWER-Henry's law Most of the atmosphere is made up of what gas? - ANSWER-Nitrogen (79%) ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/14 N=600mmHg O=160mmHg Obstructive lung diseases (>/<) 80% - ANSWER-<80% Difficult to exhale air quickly due to inc. airway resistance Restrictive lung diseases (>/<) 80% - ANSWER->80% Vital capacity is decreased, airflow doesn't change ... easy to get large % out in 1 second What does the P50 value represent? - ANSWER-The amount O2 pressure where hemoglobin is 50% saturated You just got done exercising. How do you expect our curve to shift? - ANSWER-To right to unload O2 Which of following is true regarding Co2 a. It can bind with hemoglobin b. it can be found dissolved in our blood c. 20x more soluble than O2 d. All of above - ANSWER-d. All of above Is the pressure for Co2 higher in our lungs or air? - ANSWER-Co2 pressure is higher in lun