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Examen
Bio 252 Laboratory Report
BIO 252 LABORATORY REPORT 
 
Activity 3: Recruitment and Contractions 
Name: 
 Instructor: 
 Date: 
 
 
PREDICTIONS 
 
1.	When the arm goes from resting to flexing, the amplitude and frequency of sEMG spikes will: increase 
 
2.	During flexion, the amplitude and frequency of sEMG spikes will _be more_ during extension. 
 
3.	Recruitment of motor units will be greatest when the load is: 20 
 
 
MATERIALS AND METHODS 
 
Comparison of motor unit activation during muscle tone and concentric and ecc...