Describe what makes up a motor unit and how recruitment of motor units relates to contraction response.

Describe what makes up a motor unit and how recruitment of motor units relates to contraction response. Be sure to use example from the Stimulus-Dependent Force Generation lab.Discuss the effect muscle length has on tension produced by a single twitch. Relate this to the number of cross-bridges present and support your response with the data from the Length-Tension Relationship lab.Explain the terms summation, incomplete tetanus and complete tetanus using examples from the Summation and Tetanus lab.