Question 28 At the start of exercise, which metabolic pathway is used first? A.
ID: 3508748 • Letter: Q
Question
Question 28
At the start of exercise, which metabolic pathway is used first?
A.
anaerobi glycoysis
B.
the ATP – PC pathway (phosphagens)
C.
the Cori cycle
D.
beta oxidation combined with the electron transport system
E.
aerobic glycolysis combined with the electron transport system
Question 29
Only glucose and glycogen can produce acetyl-CoA.
True
False
Question 30
Which of the following will decrease the most—as a percentage of its resting concentration--during an all-out 100-meter dash (lasting about 10 seconds)?
A.
Blood glucose concentration
B.
Muscle glycogen concentration
C.
Muscle ATP concentration
D.
Muscle CP concentration
Question 31
What would the effects of a month long high-protein, high-fat diet, low carbohydrate diet be on athletic performance during a marathon? Assume that the person will run the majority of the marathon at >80% VO2peak and will likely run the last few miles at 90% VO2peak:
A.
Improve because you have now trained the body to oxidize fatty acids for prolonged periods of time
B.
Improved performance because it provides plenty of protein / amino acids for prolonged exercise which can be used for gluconeogenesis
C.
The subject will be glycogen depleted and performance will be worse
D.
No effect
Question 32
A person accidentally ingests a substance that renders the mitochondrial electron transport chain non-functional. The following is true:
A.
Nothing will change since NADH and FADH are produced during ß-oxidation and the Krebs cycle prior to entering the ETC
B.
The Kreb’s cycle will speed up to compensate
C.
The individual will switch to protein breakdown to meet ATP needs
D.
Cellular respiration will be severely compromised
A.
anaerobi glycoysis
B.
the ATP – PC pathway (phosphagens)
C.
the Cori cycle
D.
beta oxidation combined with the electron transport system
E.
aerobic glycolysis combined with the electron transport system
Explanation / Answer
28.B.ATP-PC is the first pathway to respond.
29.False. It is also formed by Beta oxidation of fatty acids.
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