5 during arm flexion what type of contraction would

5. During arm flexion, what type of contraction would the triceps brachii be exhibiting: concentric isotonic contraction, eccentric
isotonic contraction, isometric contraction.
6. During arm extension, what type of contraction would the triceps brachii be exhibiting: concentric isotonic contraction, eccentric
isotonic contraction, isometric contraction.
7. As muscle load is increased, which muscle fiber type is recruited first, second, and last? 8. Describe the importance of this order. Include affect on force of contraction and fatigue. 9. Restate your predictions that were correct and give data from your experiment that support them. Restate your predictions that
were not correct and correct them, giving with supporting data from your experiment that supports your corrections.
Application
1. Flaccid muscles do not exhibit muscle tone. Explain how muscles become flaccid.
2. In the experiment "Muscle Tone and Concentric and Eccentric Isotonic Contractionsa", the muscle contracts isometrically prior to
the concentric isotonic contraction.
3. Explain why the muscle contracts isometrically before it shortens. The nerve that innervates the biceps brachii muscle is the
musculocutaneous nerve. Explain what effect damage to this muscle would have on contractile force and recruitment of motor units
in the biceps brachii muscle.
Laboratory Report/ Yasmin Abulsheikh/ Recruitment and Isotonic and Isometric Contractions/ Rachael W/ 08.06.2015/ Page [4] of [4]