Gen Combo Ll Basic Biomechanics; Connect Ac; Maxtraq Software Ac
8th Edition
ISBN: 9781264013876
Author: Hall
Publisher: McGraw-Hill Education
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Chapter 6, Problem 8AP
If the biceps brachii, attaching to the radius 2.5 cm from the elbow joint, produces 250 N of tension perpendicular to the bone, and the triceps brachii, attaching 3 cm away from the elbow joint, exerts 200 N of tension perpendicular to the bone, how much net torque is present at the joint? Will there be flexion, extension, or no movement at the joint? (Answer: 0.25 N-m; flexion)
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Gen Combo Ll Basic Biomechanics; Connect Ac; Maxtraq Software Ac
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- 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.arrow_forwardA high ankle sprain iis an injury caused by over stretching the ligaments connecting the tibia and fibula. What type of joint iis involved in this sprain? ball and socket gomphosis syndesmosis symphysisarrow_forwardFigure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.arrow_forward
- How do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP and calcium play?arrow_forwardWatch this video (http://openstaxcollege.org/l/anatomical) to learn about anatomical motions. What motions involve increasing or decreasing the angle of the foot at the ankle?arrow_forwardIn the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.arrow_forward
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