You likely noticed that subjects could not maintain their maximum grip strength for very long but could maintain just above 50% grip strength for quite some time. In terms of muscle unit recruitment and fatigue, explain why this is possible

Move Making Connections, Student Laboratory Packet, page 5 A2. How Does Fatigue Affect Muscle Performance? A condition known as muscle fatigue occurs when certain waste products of muscle cell activity build up in the cells. Until these waste chemicals are removed, the fatigue will continue. Do the Following Activity Hold a spring-type clothespin between your thumb and index finger. Pinch the ends together completely (until the two ends touch) and release them. Do this as rapidly as possible for one minute. Record the number of times you could squeeze the clothespin in one minute: Try the activity again, doing it the same way and using the same two fingers as before. Record the number of times you could squeeze the clothespin the second time: Answer the Following Questions Some people are able to squeeze the clothespin more times in a minute than others. Suggest a possible explanation for this. Could you do as many in a minute the second time as you could do the first time? Provide a…

Case Study on Skeletal Muscle Physiology “Time to scrub in,” says Dr. Hodges. The appendectomy you are about to observe is your second surgical case in surgical technician school. The patient, David Sims, is an 18-year-old male who was healthy until two days ago when he began having severe abdominal pain, fever, and vomiting resulting in a diagnosis of appendicitis. David is in excellent health and has never had surgery before, so you anticipate the procedure to go smoothly. Your instructor asked the anesthesiologist, Dr. Hodges, if you can observe her today during the procedure. “All of the patient’s vital signs and lab work are within normal limits so we are good to go,” says Dr. Hodges as David is brought into the operating room. You help get David ready by applying the heart monitor, oxygen saturation monitor, and blood pressure cuff. After David has been sedated, Dr. Hodges places a special tube down his esophagus to measure his core body temperature and another in his trachea (an…

Reminder: Only click 'Save & Submit' if you are ready to have this question contribute to your final grade The multinucleate v muscle fibre shown above is a striated v cell surrounded by a sarcolemma v. Each multinucleate v contains the proteins v to make the myofilament v. The alternating v bands give the cell a appearance. During a v contraction, the I band reduces in length whereas the v remains the same length.