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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

The light reactions and chemiosmosis: the organization of the thylakoid membrane. The light reactions and chemiosmosis: the organization of the thylakoid membrane.
Organization of the Food and Drug Administration showing the seven centers that regulate human and ... Organization of the Food and Drug Administration showing the seven centers that regulate human and ...
Levels of organization in striated muscle Levels of organization in striated muscle
Levels of Ecological Organization Levels of Ecological Organization
Organization of the CCR5 gene in region 3p21.3 Organization of the CCR5 gene in region 3p21.3
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Video: Mechanisms of capillary exchange (transcytosis & bulk flow)

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