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A student athelete measured his running performance on a treadmill and found the following data: 15 sec 2 min 6 MPH 5 min 6 MPH O sec 5 sec 30 sec 4 MPH 10 min 20 min O MPH 10 MPH 7 MPH 5 MPH 3 MPH His trainer explained the findings to him in terms of muscle fiber activation and fatigue: At 5 seconds, the [a] fibers in his legs were running at full force, "spending down" their stockpile of [b]. By 15 seconds, these fibers were starting to burn fuel [c), which cut their "full throttle" speed slightly, but not all that much since they could use stored [d] for fuel. Around 30 seconds, however, this first batch of fibers was starting to fatigue due to [e] and his run slowed down a bit. By 2 minutes, however, his respiratory and cardiovascular systems were delivering enough [f] to his leg muscles for his [g] fibers to take over and give him a speed boost. These fibers were burning fuel [h], which gives them more endurance, but since he had not built up much [i] in these muscles through conditioning, they had to wait for oxygen from the blood to arrive before they could really get going. Finally, around 20 minutes into this stress-test, his (j] fibers were beginning to fatigue as well and he began to seriously lose speed.

A student athelete measured his running performance on a treadmill and found the following data: 15 sec 2 min 6 MPH 5 min 6 MPH O sec 5 sec 30 sec 4 MPH 10 min 20 min O MPH 10 MPH 7 MPH 5 MPH 3 MPH His trainer explained the findings to him in terms of muscle fiber activation and fatigue: At 5 seconds, the [a] fibers in his legs were running at full force, "spending down" their stockpile of [b]. By 15 seconds, these fibers were starting to burn fuel [c), which cut their "full throttle" speed slightly, but not all that much since they could use stored [d] for fuel. Around 30 seconds, however, this first batch of fibers was starting to fatigue due to [e] and his run slowed down a bit. By 2 minutes, however, his respiratory and cardiovascular systems were delivering enough [f] to his leg muscles for his [g] fibers to take over and give him a speed boost. These fibers were burning fuel [h], which gives them more endurance, but since he had not built up much [i] in these muscles through conditioning, they had to wait for oxygen from the blood to arrive before they could really get going. Finally, around 20 minutes into this stress-test, his (j] fibers were beginning to fatigue as well and he began to seriously lose speed.

Phlebotomy Essentials
Phlebotomy Essentials
6th Edition
ISBN:9781451194524
Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Chapter1: Phlebotomy: Past And Present And The Healthcare Setting
Section: Chapter Questions
Problem 1SRQ
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  1. aerobically
  2. oxygen
  3. glycogen
  4. myoglobin 
  5. creatine phosphate
  6. FO
  7. fuel depletion
  8. anaerobically
  9. FG
A student athelete measured his running performance on a treadmill and found the following data: 0 sec 5 sec 15 sec 30 sec 2 min 5 min 10 min 20 min O MPH 10 MPH 7 MPH 4 MPH 6 MPH 6 MPH 5 MPH З МРН His trainer explained the findings to him in terms of muscle fiber activation and fatigue: At 5 seconds, the [a] fibers in his legs were running at full force, "spending down" their stockpile of [b]. By 15 seconds, these fibers were starting to burn fuel [c], which cut their "full throttle" speed slightly, but not all that much since they could use stored [d] for fuel. Around 30 seconds, however, this first batch of fibers was starting to fatigue due to [e] and his run slowed down a bit. By 2 minutes, however, his respiratory and cardiovascular systems were delivering enough [f] to his leg muscles for his [g] fibers to take over and give him a speed boost. These fibers were burning fuel [h], which gives them more endurance, but since he had not built up much [i] in these muscles through conditioning, they had to wait for oxygen from the blood to arrive before they could really get going. Finally, around 20 minutes into this stress-test, his [j] fibers were beginning to fatigue as well and he began to seriously lose speed.
Transcribed Image Text:A student athelete measured his running performance on a treadmill and found the following data: 0 sec 5 sec 15 sec 30 sec 2 min 5 min 10 min 20 min O MPH 10 MPH 7 MPH 4 MPH 6 MPH 6 MPH 5 MPH З МРН His trainer explained the findings to him in terms of muscle fiber activation and fatigue: At 5 seconds, the [a] fibers in his legs were running at full force, "spending down" their stockpile of [b]. By 15 seconds, these fibers were starting to burn fuel [c], which cut their "full throttle" speed slightly, but not all that much since they could use stored [d] for fuel. Around 30 seconds, however, this first batch of fibers was starting to fatigue due to [e] and his run slowed down a bit. By 2 minutes, however, his respiratory and cardiovascular systems were delivering enough [f] to his leg muscles for his [g] fibers to take over and give him a speed boost. These fibers were burning fuel [h], which gives them more endurance, but since he had not built up much [i] in these muscles through conditioning, they had to wait for oxygen from the blood to arrive before they could really get going. Finally, around 20 minutes into this stress-test, his [j] fibers were beginning to fatigue as well and he began to seriously lose speed.
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