Gaseous Exchange: Hypoxia and Hyper- and Hypo-Capnia Flashcards
Regarding the production of ATP, oxygen is required for (true or false):
A. Glycolysis
False. Glycolysis refers to the conversion of glucose to pyruvate, which can proceed by substrate phosphorylation.
Regarding the production of ATP, oxygen is required for (true or false):
β oxidation of fatty acids
True
Regarding the production of ATP, oxygen is required for (true or false):
Conversion of amino acids to acetyl CoA
True
Regarding the production of ATP, oxygen is required for (true or false):
Krebs Cycle
True. High energy reduced compounds need to be oxidised in the electron transfer chain to enable the Krebs cycle to continue.
Regarding the production of ATP, oxygen is required for (true or false):
Electron transfer chain
True. Oxygen is the final step accepting electrons.
How much energy is produced from the aerobic metabolism of each glucose molecule?
A. 38 ATP
B. 2 ATP
C. 19 ATP
D. 6 ATP
E. 22 ATP
A.
The followings shifts the O2 dissociation curve to the right (true or false):
Increase in pH
False. An increase in pH, shifts the curve to the left, increasing the affinity of Hb for O2.
The followings shifts the O2 dissociation curve to the right (true or false):
Increase in [H+]
True
The followings shifts the O2 dissociation curve to the right (true or false):
Increase in temperature
True
The followings shifts the O2 dissociation curve to the right (true or false):
Increase in 2,3-DPG
True
The followings shifts the O2 dissociation curve to the right (true or false):
Increase in Hb
False
These responses are mediated by the peripheral chemoreceptors (true or false):
Ventilatory response to hypoxia
True. The peripheral chemoreceptors respond to changes in PO2, PCO2 or [H+]. Stimulation causes both respiratory and cardiovascular changes.
The central chemoreceptors respond to changes in PCO2, however this is enhanced by the detection of hypoxia by the peripheral receptors.
These responses are mediated by the peripheral chemoreceptors (true or false):
Ventilatory response to hypotension
True. The effect is probably due to stagnant hypoxia at the peripheral chemoreceptors.
These responses are mediated by the peripheral chemoreceptors (true or false):
Circulatory response to hypoxia
True. The peripheral chemoreceptors respond to changes in PO2, PCO2 or [H+]. Stimulation causes both respiratory and cardiovascular changes.
The central chemoreceptors respond to changes in PCO2, however this is enhanced by the detection of hypoxia by the peripheral receptors.
These responses are mediated by the peripheral chemoreceptors (true or false):
Ventilatory response to hypercapnia
True
