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envinsite envinsite
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12 years ago
Need some help with Activity 1 - specifically to confirm which rat had highest met rate and why they differed.
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Educator
12 years ago
The normal rat’s metabolic rate is faster than the metabolic rates of the thyroidectomized and hypophysectomized rats. The thyroidectomized rat lacks a thyroid, thus produced no thyroxine. The hypophysectomized rat lacks a pituitary gland, thus produced no thyroid stimulating hormone to stimulate thyroxine production. Because the normal rat produced thyroxine normally, its metabolic rate was faster than the other rats.
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