1. Based upon this simulation, what did you learn about a muscle\'s workload and
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1. Based upon this simulation, what did you learn about a muscle's workload and its threshold of stimulation? 2. Why would a muscle's threshold of stimulation change as its workload changes? 3. Which muscles were able to contract under the greatest loads? What does this suggest about the role these muscles play in frog movement? 4. Describe an experiment you might develop to determine which leg muscles are important for jumping long distances. 5. What are advantages to performing this experiment in a simulated environment? 1. Based upon this simulation, what did you learn about a muscle's workload and its threshold of stimulation? 2. Why would a muscle's threshold of stimulation change as its workload changes? 3. Which muscles were able to contract under the greatest loads? What does this suggest about the role these muscles play in frog movement? 4. Describe an experiment you might develop to determine which leg muscles are important for jumping long distances. 5. What are advantages to performing this experiment in a simulated environment? 1. Based upon this simulation, what did you learn about a muscle's workload and its threshold of stimulation? 2. Why would a muscle's threshold of stimulation change as its workload changes? 3. Which muscles were able to contract under the greatest loads? What does this suggest about the role these muscles play in frog movement? 4. Describe an experiment you might develop to determine which leg muscles are important for jumping long distances. 5. What are advantages to performing this experiment in a simulated environment?Explanation / Answer
MUSCLE WORKLOAD- It is the amount of load a muscle can bear at a given point of time.
THRESHOLD OF STIMULATION- It is the weakest electrical stimulation (in volts) required to cause a muscle to twitch.
1. As the workload doubles, the threshold stimulus usually increases by 1. A muscle that has a higher threshold of stimulation with no workload can handle a much higher workload.
2. On increasing the workload , the amount of force required to cause the contraction will also increase, which means more amount of muscle fibres should be excited. Therefore on increasing the workload , the threshold of stimulation also increases.
3. The muscles that will be able to contract is under the greatest loads is the calf and the thigh muscles. These muscles are required for the frog to leap, and they bear the weight of the frog while causing the frog to jump.
4. As we know , muscles isn the vertebrates are contractile in nature . There is a specific relation between the length of the mucle before contraction(L0), and the force of contraction.
It is found that , as the muscles shortens , from the relaxed position, the force of contraction increases. It is observed till a point where the the contraction is maximum( the length at which this occurs is called the optimal length). Further shortening of the length of the muscle will decrease the force of contraction. Hence,a single peak is obtained when the force of contraction vs the initial length of the muscle is plotted .
For performing this experiment , we folloewing materials and method are needed-
5. The advantages of performing the experiment in a stimulated environment is that -
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