Jack, a student in BIO 131, is the subject for this lab and has his EMG recorded
Question:
Jack, a student in BIO 131, is the subject for this lab and has his EMG recorded dorm, maximal contraction. To achieve a maximal contraction, he most lift 45 pounds, Six months later, after working out steadily and maintaining a healthy diet. Jack's muscles are notably bigger. He decides to try to elicit a new maximal contraction (and record the (MG), and Is now able to lift 60 pounds.
1. Compare the EMG recordings for lack's maximal contraction "before" and "after" his 6 month training sessions. Circle the correct answer below:
(a) The EMGs will have the same amplitude
(b) The "before" EMG will have a larger amplitude
(c) The "after EMG will have a larger amplitude
2. After his muscle growth, what would you expect lack's EMG to look like if he lifted 45 pounds as he did "before"? Explain your answer in terms of motor unit recruitment.
3. Why were Jack's muscles "notably bigger" after his 6 month training period? What caused the Increase in muscle size?
Financial Accounting Tools for Business Decision Making
ISBN: 978-0470239803
5th Edition
Authors: Jerry J. Weygandt, Paul D. Kimmel, Donald E. Kieso