This experiment is about the effect of exercise on muscles. There are many reasons why muscles might fatigue when exercise is performed. One…
4. Why is there a maximal voltage? What has happened to the muscle at this voltage?…
17) Tests both upper and lower motor pathways. The sole of the foot is stimulated with a dull instrument.…
Refer to lab protocol for exact measurements. For each trial, the participant had to move a stylus between two targets, moving as fast as possible while maintaining accuracy. Each trial consisted of a fifteen second period, the number of total taps was recorded. Results from five participants were taken. Results represented movement times for index’s of difficulties of 1-4. The index of difficulty was an independent variable, movement time the dependent variable. It was expected that movement time was to increase with an increase in index of…
Virtual Lab Stimulation Exercise 3 Activities 1-5 Study online at quizlet.com/_cfevi 1. 2. 3. 4. 5.…
5. Present your data (i.e. include an Excel figure suitable for a report; this does NOT mean simply copy and paste your raw data file) representing the relationship between tension development and stimulus intensity. Did tension increase when you set the stimulator to voltages greater than the maximum voltage (explain why or why not)?…
At low frequency, the muscle relaxes completely between stimuli and shows twitches of uniform strength. (b) Treppe. At a moderate frequency of stimulation, the muscle relaxes fully between contractions, but successive twitches are stronger. (c) Wave summation and incomplete tetanus. At still higher stimulus frequency, the muscle does not have time to relax completely between twitches and the force of each twitch builds on the previous one. (d) Complete tetanus. At high stimulus frequency, the muscle does not have time to relax at all between stimuli and exhibits a state of continual contraction with about four times as much tension as a single twitch. Tension declines as the muscle fatigues. Only the conditions in parts (b) and (c) occur in the human body; those depicted in (a) and (d) are produced only by artificial stimultion below or above the range of nerve firing…
The musculoskeletal response has an effect on the flexibility of the muscles during and after exercise. During exercise I got 18 cm in the sit and reach test and post exercise was 17 cm this shows that exercise has an effect on muscle pliability during acute exercise.…
**level of vasodilation regulated by metabolic need of the muscle (intensity and # of motor units recruited determines blood flow to active muscle fibers)…
1. The latent period of the skeletal muscle that was tested in this lab simulation was…
IV. Conclusion: I saw that the subject’s grip strength was weakening drastically towards the end of each trial, but it seemed that the continuous gripping was more tiring than the repetitive gripping. This supports my hypothesis that the muscle fatigue is greater in the continuous grip.…
In this activity you will use an EKG sensor and a measuring device called an accelerometer to compare the speed of voluntary versus reflex muscle action. Just as it can measure the electrical activity of your heart, the EKG sensor will measure the electrical activity in a moving muscle. When we record the electrical activity in muscles, we call this reading an electromyogram or EMG. You will make a rough calculation of nerve impulse speed using data generated by an accelerometer and the EKG sensor. As you analyze data for response times, you will also investigate what has to occur in the nervous system during a reflex and a voluntary action.…
To examine the effects of increasing tension on the heart muscle, the tension of the force transducer was increased by 0.5 mm increments every 10 seconds while recording with Lab Tutor. This was done by slowly turning the micropositioner knob. The process was repeated for 4 more lengths, taking care not stretch the heart too much. When done recording, the micropositioner was returned to its original position to return tension to normal.…
The data collected during this experiment did not support my hypothesis. The student that exercised was able to squeeze the clothespin more times in one minute than the student who did not exercise since they had a faster pulse rate. A faster pulse rate means more blood is being transported to the student’s muscles quicker which is why they were able to squeeze the clothespin more.…
Contraction of slow twitch fibers is easily achieved, however the contraction of the fast twitch type IIb fibers is very hard to achieve. So both the slow twitch (type I) and fast twitch (type IIa and IIb) are recruited to cause a contraction dependent on the external force. To gain muscle hypertrophy that occurs at its greatest level in the type IIb fibers, the external force must be great enough to recruit the type IIb fibers. The significant evedince of resistance training is This increases in both Type I and Type II fiber hypertrophy.…