lab_2_discussion - Laboratory Exercise # 2 Skeletal Muscle...

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Laboratory Exercise # 2 Skeletal Muscle Mechanics 1. What is a skeletal muscle fiber? Present (and explain) a diagram that demonstrates the interaction between actin and myosin during contraction. What is the role of calcium, troponin, and tropomyosin? 2. Present the basic anatomy of a motor neuron input into skeletal muscle. How is each muscle fiber innervated? What is a motor unit? What are the advantages/disadvantages of large and small motor units? What kinds of muscles contain these units? 3. In this lab, what biological signal did we record? What was stimulated to elicit that recorded signal? Define threshold. What is the difference between threshold in a muscle versus that in a neuron? What is the relationship between the muscle threshold and the biological signal that was recorded? 4. What is a muscle twitch? How does it differ from a smooth (i.e., a tetanic) muscle contraction? With regards to skeletal muscle, define the term recruitment? What is the importance of recruitment? 5.
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This note was uploaded on 03/01/2010 for the course NPB101L 83009 taught by Professor Liets during the Spring '09 term at UC Davis.

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