Chapter 9, Problem 14RQ

At the gym Sean gets on a stair-climbing machine and climbs as fast as he can for fifteen minutes. At the end of that time he is breathing hard and his quadriceps and other leg muscles are aching. What is the physiological explanation for these Symptoms?

What do you need to do to meet the Physical Activity Guidelines for Americans? What are the benefits if you do? What are the consequences if you dont?

Which statement is tine concerning the knee joint? The lateral meniscus is an intrinsic ligament located on the lateral side of the knee joint. Hyperextension is resisted by the posterior cruciate ligament. The anterior cruciate ligament supports the knee when it is flexed and weight bearing. The medial meniscus is attached to the tibial collateral ligament.

Watch this animation (http://openstaxcollege.org/l/hipreplace) to observe hip replacement surgery (total hip arthroplasty), which can be used to alleviate the pain and loss of joint mobility associated with osteoarthritis of the hip joint. What is the most common cause of hip disability?

Which element is important in directly Triggering contraction? sodium (Na+) calcium (Ca++) potassium (K+) chloride (Cl- )

Explain how a synergist assists an agonist by being a fixator.

Describe the two types of cartilaginous joints and give examples of each.

Which of the following terms would be used in the name of a muscle that moves the leg away from the body? flexor adductor extensor abductor

The elbow is an example of which type of joint? hinge pivot saddle gliding