i provide everythig you may need to answer these questions, plz tell me what you
ID: 93213 • Letter: I
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i provide everythig you may need to answer these questions, plz tell me what you really need so i can send you
OBJECTIVES in sis experiment, you in hand savength during a continuous over time. Oenerve the change during rapid repeteve grpping observe the change in hand strength Select one person mom your lab group to be the subject Parti Musele sowngth Continuous Grp 17a Grip Strength Fatigue Haman Any nology Werner older. 2 zero the readings for the Hand Dymamometer Hold the Hand Dynamometer along the sides in (see not on the pads of he b Click the Zero button, should be at a 90" angle, with the arm unsupported (see Figure 3. 4. Have the subject close hisher eyes, or avert them from the 5 Instruct the sueject to grip the sensor with full strength and begin data collection. subject should exert maximum effort with each grip throughout the duration of the At 90 s, the lab partner(s) should encourage the subject to grip even harder. Data will be collected for 100 s. Determine the maximum force exerted during different time intervals. a Position the cursor at 0 s and click and drag to highlight 0-10 s on the graph. b. Cick the Statistics button, to see the Statistics box. Record the maximum force during the interval in Table 1, rounding to the nearest As you move the d Move brackets to the 20-30 s period the Statistos box be rounding to the nearest e between the brackets. this interval in Table 1. Record the maximum force during Repeat this process for the time intervals 40-50 s 60-70 s, and Bo 90 s. in the corner of the box g. Close the Statistics box by clicking the record differenoe between each maximum value and the next and these values in Table 9, Position the cursor at PartE Muscle Strength with Repetiive Grip 11. Have the subject sit back straight and feet nat on the a gor the hand. The should be at with the arm unsupported (see Figure 2) 12. Have the subject close his/her eyes, or avert them from the screen. 13. zero the readings for the Hand Dynamometer any force on the gray pads of the b. Click the Zero button. Click to begin data collection. The suh should exert maximum effort throughout the duration of the experiment. 15. At 90s, the lab partners) should encourage the subject to grip even harder. D will be colected for 100 s. Determine the maximum force exerted during different time intervals. 16, a. Position the cursor at o s and click and drag to highlight 0-10 s on the gra b. Click the Statistics button, and record the maximum force during that in Table 2, rounding to the nearest 0.1 N. c, Move the brackets to highlight the 20-30 s period on the based on the brackets, the statistics in the Statistics box will be d. Record the maximum force during this interval in Table 1, rounding to t 0.1 N e. Repeat this process for the time intervals: 40-50 60-70 s, and 80-9 then close the Statistics box by clicking the x in the corner of the box. 17. Calculate the difference between each maximum value and the next ancExplanation / Answer
1. Ans:) The number of muscle fibres firing in the last 10sec are more compared to the first 10sec. Because while holding the sensor the muscles are expanded with high force and as the time goes there is a decrease in the force applied on the sensor showing that the muscles are contracted concentrically causing the firing of many muscle fibres.
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2.Ans) No. The change in muscle contracting is not at a constant range. Because the change in the force applied after the regular time intervals vary.
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3 Ans) In the first 10 sec - The fast muscle fibres starts contracting because they are less tolerant to fatigue.
In the second 10 sec- The intermediate muscle fibres start contracting beacuse the tolerance to fatigue is fairly high.
In the next 10 sec- The slow muscle fibres start contracting- They will contract very slowly beacuse they are highly tolerant towards the fatigue.
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4. Ans) It shows that the subject is responding to the physiotherapy, as the force on the sensor is increased and the muscle contraction is found to be active comparitively from the initial time of the experiment in repetetive grip. Also the last 10sec in the continous grip showed the increased force on the grip compared to the previous 10 sec. So it shows that the subject is finally responding to the physiotherapy. And the central nervous system which controls skeletal muscles voluntarily is responding fairly. The motor neurons are collectively controlling the muscle fibres and the action potentials generated for the muscle contraction are working fairly.
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5. Ans) From the slopes in the graph it is evident that the rates of difference in contraction in repetitive is low compared to the continuous grip. So every time the muscle relaxes it gains strenth to revert back the same.
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