Review questions? Flashcards
The E generated in the breakdown of food serves on purpose. what is it?
to phosphorylate ADP-ATP
What E compound is utilized for all biological work?
ATP
What 2 compounds can be resynthesizes without presence of O2?
ATP and CP
How many molecules of ATP are formed in the total breakdown of glucose?
36
What is the main function of the Krebs cycle?
to degrade acetyl-CoA to CO2 and hydrogen atoms
What is the process that involves reactions to transfer either O2 atoms, hydrogen atoms, or electrons?
cellular oxidation
What 2 conditions exist during strenuous exercise cause LA to form?
inadequate delivery of O2 to accept electron and hydrogen
inadequate enzymes and metabolic machinery
Energy system that supplies E for long term work?
Aerobic
Energy system that is dominant during 100 Yard dash?
ATP-CP
Energy system dominant during a mile sprint?
LA system
energy system predominantly used by power lifters?
ATP-CP
The only fuel brain uses?
CHO
When there is an excess of FFA the liver will convert them to what lipoprotein?
LDL
The only fuel that can generate ATP anaerobically?
CHO
The breakdown of this fuel when taken in excess can lead to kidney or liver problems
Protein
The breakdown of fats require what substrate of glucose breakdown to enter metabolic mill?
oxaloacetic acid
Name 2 reasons why CHO restriction can be detrimental to ones health.
lack of fuel for brain
Acetyl CoA from beta oxidation and the FFA from adipose tissue cannot enter Krebs cycle and are converted to ketone bodies by liver.
At about 75% VO2 Max, what is the main fuel source for sustaining exercise?
CHO
What is difference b/w O2 debt and deficit.?
VO2 required in
debt: during recovery to return to homeostasis.
deficit: circulatory lag/time to reach steady state.
What is the major determinant of VO2 Max?
Q/Cardiac Output
The larger Q acquired by athletes during aerobic exercise is due to the attainments of a larger
Stroke Volume.
At what point does SV plateau during exercise?
40-50%
In trained individuals, the increase in ! from rest to exercise is augmented by
increase in HR and Stroke volume
What mechanism is responsible for the decrease in HRs after training?
Decrease in SNS tone and increase in PNS tone
What mechanism(s) is responsible for increase in MAP during aerobic Exercise?
Increase in Q and vasoconstriction in the nonworking muscles.
