What limits a joint's range of motion?Bones are joined by ligaments that limit their movement. Well-exercised muscles of a shoulder joint will limit the possibility of a dislocation. Joint movement is limited by the shapes of the bone's articular surfaces. When extending the elbow, it is the shape of the olecranon of the ulna and the olecranon fossa of the humerus that limit its range of motion.The ligament that is an extension of the quadriceps femoris tendon is the __________.patellarDisuse of a joint results in __________ range of motion, and swelling of tissues surrounding a joint results in __________ range of motion.decreased; decreasedWhich of the following are age-related changes with the joints?Range of motion decreases. Production of synovial fluid decreases. The rate of cartilage replacement decreases.Lateral movement of the mandible for chewing or grinding the teeth is __________.excursionWhich bone does not contribute to the medial longitudinal arch of the foot?cuboid

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anatomy and physiology

Harry is a 55-year-old college professor who teaches a night class in a small town about 50 miles from his home. One night, as he walked to his car after class, Harry noticed that his right leg was uncomfortable. When he arrived home, about 90 minutes later, Harry realized that the calf of his right leg had become very swollen. When he extended his knee and plantar flexed his foot, the pain in his right leg increased. Harry thought this might be a serious condition, so he drove to the hospital. In the emergency room, technicians performed a Doppler test, which monitors the flow of blood through blood vessels. The test confirmed that a thrombus had formed in one of the deep veins of Harry’s right leg. His pain and edema were consistent with the presence of a venous thrombosis. Harry was admitted to the hospital, and his physician prescribed intravenous (IV) heparin. About 4 a.m., Harry experienced an increase in his respiratory rate, his breathing became labored, he felt pain in his chest and back, and his arterial oxygen levels decreased. In response to these changes, Harry’s physician increased the amount of heparin. The chest pain subsided, and Harry’s respiratory movements improved over the next 24 hours. The next day, a CT scan revealed pulmonary emboli, but no infarctions of the lung. The edema in Harry’s leg also slowly improved. Harry remained in the hospital for several days, during which heparin was continued and then oral coumadin was prescribed. Frequent blood samples were taken to determine Harry’s prothrombin time. After about a week, Harry was released from the hospital. His physician, however, prescribed oral coumadin for at least several months. In addition, Harry was required to have his prothrombin time checked periodically.

If a thrombus in the posterior tibial vein gave rise to an embolus, name in order the parts of the circulatory system the embolus would pass through before lodging in a blood vessel in the lungs. Explain why the lungs are the most likely places the embolus will lodge.

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physics

If you turn on a coffee grinding machine sitting on a smooth tabletop, what do you expect it to do? (a) Start rotating in the same direction as the blades rotate (b) Start rotating in the direction opposite the blade rotation (c) Grind the coffee without any rotation of the machine

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chemistry

Calculate the mass in grams of hydrogen chloride produced when $5.6 \mathrm{~L}$ of molecular hydrogen measured at $\mathrm{STP}$ react with an excess of molecular chlorine gas.

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chemistry

Using hybridization, predict how the bond length of the C – C

\sigma

bond in

\mathrm { HC } \equiv \mathrm { C } - \mathrm { C } \equiv \mathrm { CH }

should compare with the C – C

\sigma

bonds in

\mathrm { CH } _ { 3 } \mathrm { CH } _ { 3 } \text { and } \mathrm { CH } _ { 2 } = \mathrm { CH } - \mathrm { CH } = \mathrm { CH } _ { 2 }.

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JOINTS AND MOVEMENT

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Joints and movement, Skeletal system

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