Frog Skeletal Muscle

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Submitted By SuleimanS
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Frog Skeletal Muscle

S ta rted 2:10 p m Au g 4, 2014

Exercise 1: T witch Recruitment
Using the Ho rizo ntal Co mpressio n butto ns and the scro ll bar, display the data yo u wish to include in yo ur repo rt.

1. As yo u increase vo ltage to the muscle describe ho w it respo nds to the increased stimulus.
Answer

St udy Quest ions
2. What was the smallest vo ltage required to pro duce a co ntractio n (the thresho ld vo ltage)? What pro po rtio n o f the fibers in the muscle do yo u think were co ntracting to pro duce this small respo nse?
Answer

3. What was the smallest vo ltage required to pro duce the maximum (largest) co ntractio n? What pro po rtio n o f the fibers in the muscle do yo u think were co ntracting to pro duce this maximal respo nse?
Answer

4. What do yo u co nclude happened to the number o f fibers co ntracting as the vo ltage was raised fro m thresho ld to that required to pro duce a maximal co ntractio n?
Answer

5. In light o f the all o r no ne law o f muscle co ntractio n, ho w can yo u explain the graded respo nse?
Answer

Exercise 2: Effects of Stretch
Using the Ho rizo ntal Co mpressio n butto ns and the scro ll bar, display the data yo u wish to include in yo ur repo rt.

6. Describe ho w the iso lated muscle behaved as it was stretched pro gressively.
Answer

St udy Quest ions
7. What effect do es stretching the muscle have o n co ntractio n strength? Is this effect linear?
Answer

8. What stretch resulted in the highest co ntractio n fo rce? What happens to the muscle at the highest stretch levels?
Answer

Exercise 3: Summation
Using the Ho rizo ntal Co mpressio n butto ns and the scro ll bar, display the data yo u wish to include in yo ur repo rt.

9. Describe ho w the iso lated muscle behaved as the stimulus interval was decreased pro gressively.
Answer Answer D ue to decreasing the…...

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