BIO 139 Lecture Exam 2 Questions and Answers
How 20-30% of CO2 is transported in the blood - -bound to hemoglobin
carbaminohemoglobin (Hb+CO2)
-How 70% of CO2 is transported in the blood? - -bicarbonate ion
HCO3-
-What is the group in the medulla that initiates inspiration? - -ventral respiratory group
-Explain how hyperventilation can affect pH? - -Hyperventilation blows off CO2,
decreasing volume of CO2. The decrease in CO2 increases pH
decrease in CO2, increase in pH
-increasing pH from 7.4 to 7.9 - -increase in pH, increase in hemoglobin saturation
-increasing body temperature from 37 degrees to 43 degrees - -increase in body temp,
decrease in hemoglobin saturation
-decreasing PCO2 from 45 mmHg to 40mmHg in arterial blood - -decrease in PCO2,
increase in hemoglobin saturation
-pCO2 in pulmonary veins - -40 mmHg
-pO2 in alveoli - -105 mmHg
-pO2 in pulmonary arteries - -40 mmHg
-pO2 in venous blood - -40 mmHg
-pO2 in the tissues - -40 mmHg
-describe the diffusion of carbon dioxide between the blood and the lungs. make sure you
include the appropriate partial pressure of CO2 in your answer - --carbon dioxide diffuses
across its pressure gradient (high concentration-low concentration) goes from blood (45
mmHg) to lunch which a has a partial pressure of 40 mmHg. There is 5 mmHg difference
between the pCO2 of blood and lungs
-during inspiration the diaphragm _________, and intrapulmonary volume ________.
Intrapulmonary pressure _________. Give the approximate numerical value of
intrapulmonary pressure at this time______. - -contracts; increases; decreases; 758 mmHg
-when expiration becomes active, what 2 muscles are involved - -internal intercostal
muscles
How 20-30% of CO2 is transported in the blood - -bound to hemoglobin
carbaminohemoglobin (Hb+CO2)
-How 70% of CO2 is transported in the blood? - -bicarbonate ion
HCO3-
-What is the group in the medulla that initiates inspiration? - -ventral respiratory group
-Explain how hyperventilation can affect pH? - -Hyperventilation blows off CO2,
decreasing volume of CO2. The decrease in CO2 increases pH
decrease in CO2, increase in pH
-increasing pH from 7.4 to 7.9 - -increase in pH, increase in hemoglobin saturation
-increasing body temperature from 37 degrees to 43 degrees - -increase in body temp,
decrease in hemoglobin saturation
-decreasing PCO2 from 45 mmHg to 40mmHg in arterial blood - -decrease in PCO2,
increase in hemoglobin saturation
-pCO2 in pulmonary veins - -40 mmHg
-pO2 in alveoli - -105 mmHg
-pO2 in pulmonary arteries - -40 mmHg
-pO2 in venous blood - -40 mmHg
-pO2 in the tissues - -40 mmHg
-describe the diffusion of carbon dioxide between the blood and the lungs. make sure you
include the appropriate partial pressure of CO2 in your answer - --carbon dioxide diffuses
across its pressure gradient (high concentration-low concentration) goes from blood (45
mmHg) to lunch which a has a partial pressure of 40 mmHg. There is 5 mmHg difference
between the pCO2 of blood and lungs
-during inspiration the diaphragm _________, and intrapulmonary volume ________.
Intrapulmonary pressure _________. Give the approximate numerical value of
intrapulmonary pressure at this time______. - -contracts; increases; decreases; 758 mmHg
-when expiration becomes active, what 2 muscles are involved - -internal intercostal
muscles
