Homework: Muscle Fatigue
Laboratory: ATP and Muscle Fatigue
Log in to eScienceLabs to review muscle anatomy and learn about muscle fatigue in the lab exercise. You will watch three animations: the muscular system, major muscles of the body, and muscle cell contraction. The pre-lab reading will reinforce the different groups of major muscles and how muscles enable movement of the body. The sliding filament theory, action potential concepts, function of motor neurons, twitch fibers, and force summation concepts will be reviewed again in the pre-lab readings. The lab exercise will allow you to learn how muscles behave when they are fatigued and the length of time it takes for this to occur.
Table 1: Muscle Fatigue Data
Trial Time (Seconds)
Trial 1
Trial 2
Trial 3
Post-Lab Questions:
a) Did you notice any changes in the amount of time you could perform each wall sit, or how your legs felt after each of the trials?
b) Explain the actions that were occurring at the molecular level to produce this movement. Include sources of energy and any possible effect of muscle fatigue.
c) Hypothesize what would happen if blood flow was restricted to the leg when this experiment is performed.
d) How do banding patterns change when a muscle contracts?
e) What is the difference between a muscle organ, a muscle fiber, myofibril and a myofilament?
f) Outline the molecular mechanism for skeletal muscle contraction. At what point is ATP used and why?
Format your homework according to the give formatting requirements:
a. The answer must be double spaced, typed, using Times New Roman font (size 12), with one-inch margins on all sides.
b. The response also includes a cover page containing the title of the homework, the course title, the student's name, and the date. The cover page is not included in the required page length.
c. Also include a reference page. The references and Citations should follow APA format. The reference page is not included in the required page length.