using the CPT manual, assign the appropriate code for the fo…
Questions
using the CPT mаnuаl, аssign the apprоpriate cоde fоr the following Urinary case: An endoscope was passed through the urethra. The urethra was normal in appearance, as was the bladder upon examination. The cystourethroscope was then directed to the right ureter. Slight narrowing was seen in the distal third of this ureter. A double-J stent was placed in the right ureter. The left ureter was then examined and found to be normal. The stent will be removed at a later date. CPT Code
The key reаctiоn thаt led tо Bоyer’s proposed mechаnism (loose-tight-open) for the reaction catalyzed by ATP synthase is shown below. The experiment was done in the presence of 18O labeled water with the free enzyme. The results of this experiment led him to propose a unique mechanism of action for the synthesis of ATP by ATP synthase in the late 1950’s. Briefly explain what this experiment implied about the mechanism of action of ATP synthase. (2 pts.) ADP + Pi + H2O18 à ADP + Pi (with 18O label) + H2O Explain why the transport of ATP to the cytoplasm via the adenine nucleotide translocase during active ATP synthesis would result in a net reduction of the H + gradient across the inner mitochondrial membrane i.e. how does the proton gradient “power” this translocase. (2 pts.) The ATP requirement of hibernating bears is much lower than that of active bears but they still need to maintain their body temperature. This is accomplished by opening a direct proton channel across the inner mitochondrial membrane. Explain how this open channel would uncouple oxidative phosphorylation from electron transport and produce heat. (2 pts.) The electrons in NADH + H+ from step 6 (GAP dehydrogenase) can enter the matrix by reduction of oxaloacetate in the cytosol to malate. Malate can cross the mitochondrial membranes and deliver the electrons again NADH + H+ as malate is oxidized to oxaloacetate in the matrix. These electrons can then enter the electron transport chain. There is an alternate pathway for these electrons to enter the electron transport chain. In this pathway, the NADH + H+ reduces dihydroxy acetone phosphate (DHAP) to glycerol-3-phosphate in the cytosol and these electrons enter into the electron transport chain via a complex similar to complex II. Briefly explain why the total ATP produced from one molecule of glucose is typically given as either 30 or 28 total. (2 pts.)