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Suggest how an increase in synovial fluid (due to a severe blow) could affect the movement at a joint. This is a question I got from a GCE ordinary level paper and it contains 2 marks.

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dano7744 eNotes educator | Certified Educator

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Synovial fluid is contained in synovial membranes like behind your kneecap or patella. Normally, this fluid serves to lubricate articulations (joints). When any tissue sustains trauma the tissue swells because of increased blood flow to the area and in this case, the amount of synovial fluid would increase after receiving the blow. It may also have blood in the fluid because of the same trauma to the underlying tissues. When tissues swell due to increased fluids like blood and or synovial fluid this adversely affects the function of the articulation (joint) because of decreased mobility due to the increase in fluid. The joint will become sore and stiff because of the increased pressure exerted by the increased fluids in the particular space. This soreness and stiffness will limit your use of the area. In cases of the knee, this additional fluid is often drained to decrease the amount of fluid thereby decreasing the pressure and pain. This decrease in fluid increases productive use of the joint.

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An excess of synovial fluid (or any fluid in a cavity) restricts the movement of a joint (or an orgran). The increased volume restricts the range of motion, and in come cases, especially that of gout, may have an increase in white blood cells and crystals. This additive can then lead to sepsis and pain, inflammation, and decreased movement. The patient may exhibit protective characteristics of the affected limb and stiffness will then arise from the inability to move the joint. Excess or forced movement of the joint under those conditions may lead to cartilage and ligament damage.

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