Thyroid hormones ...

Question

Accepted Answer

increase the transcription and activity of enzymes of the respiratory chain.

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are mostly bound to plasma proteins in the blood

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are T3 and T4: T4 is the most abundant, it is converted to T3 within the target cell

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exert their actions both by binding with intracellular receptors and by interacting with surface proteins (integrins)

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are synthesized on demand to help regulating body temperature

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are T3 and T4: T4 must be converted to T3 in the blood to be active on target cells.

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have lower levels in Basedow-Grave's syndrome due to autoantibodies against TSH receptors.

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are secreted in response to stress signals

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tend to produce weight gain, fatigability and weakness

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selectively modulate the respiratory chain in specific tissues that possess membrane receptors

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are proteins that are preserved in the follicular colloid

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are T3 and T4; the latter is the most abundant in blood and the most effective because it more easily enters the target cells

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are stimulated and their action is enhanced by stress, trauma, inflammation and infection

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