1. Explain the difference between fused and unfused tetanus. (2 pts) Describe wh
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1. Explain the difference between fused and unfused tetanus. (2 pts) Describe what is happening inside the contracting muscle cells that allows for increasing force of contraction with multiple stimuli? (2 pts) 2. of he we siaodsedflecd canu7 ip Describe what happened to the ability of the muscle to sustain its contraction when multiple stimuli at a high frequency were applied continuously (allowing the tracing to cross the screen three times) (2 pts) 4. What term is used to describe this effect? (1 pt) Experiment 4: Isometric contraction 1. Describe what is meant by an isometric contraction (2 pts) Describe what happens to the length of sarcomeres inside a muscle as you lengthen the muscle itself? (2 pts) 2. Explain what is happening inside a sarcomere as its length is altered that would affect the force of contraction? In other words, why do you see the change in force of contraction as you alter the sarcomere length? (2 pts) 3.Explanation / Answer
1) Fused Tetanus - stimulus frequency is so high and no muscle relaxation takes place between the stimuli.
Unfused Tetanus - there is some muscle relaxation between the stimuli .
2) When the muscle is stimulated multiple times the relaxation time between the twitches become shorter and the concentration of calcium in the cytosol increases gradually and also the degree of wave sumation becomes greater leading to sustained but quivering contraction.
3) fused tetanus is produced by high stimulus frequency .
4) Muscular endurence .
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