The type of fibers specialized to continue contracting for extended periods of time, as would be required in running a marathon, for example, are _____ fibers.
A. fast-twitch
B. slow-twitch
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Question 2) Oxidative fibers are
A. red and fatigue-resistant.
B. red and fatigable.
C. white and fatigue-resistant.
D. white and fatigable.
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Question 3) The vascular supply to slow-twitch muscle fibers is ______ the network of capillaries around fast-twitch muscle fibers.
A. more extensive than
B. less extensive than
C. the same as that of
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Question 4) Glycolytic muscle fibers tend to be very rich in myoglobin and mitochondria.
Indicate whether this statement is true or false.
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Question 5) Compared to slow-twitch fibers, fast-twitch fibers respond to a stimulus with less delay and with a shorter contraction duration.
Indicate whether this statement is true or false.
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Question 6) Heavy breathing to compensate for an oxygen debt helps the body convert lactate to glucose.
Indicate whether this statement is true or false.
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Question 7) If someone is engaged in six minutes of vigorous exercise, nearly all of the ATP used is generated by phosphate transfer.
Indicate whether this statement is true or false.
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Question 8) When someone engages in exercise that requires more oxygen than is available, they develop a(n) _____ _______ (2 words), which results in heavy breathing for several minutes after the exercise is complete.
Fill in the blank with correct word.
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Question 9) The electron transport system refers to oxidative phophorylation using the coenzymes FADH2 and _______.
Fill in the blank with correct word.
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Question 10) Myosin kinase catalyzes the transfer of Pi from creatine phosphate to ADP.
Indicate whether this statement is true or false.
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