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Removal of the parathyroid glands during a thyroidectomy lowers parathormone and produces sustained muscle contractions known as:
ATetany
BAcromegaly
CCretinism
DGlycosuria
Answer & Solution
Correct answer: A. Tetany
1. Parathormone regulates blood calcium by acting on bone, kidney and intestine.
2. If parathyroid glands are removed during thyroidectomy, parathormone falls.
3. Low calcium then causes sustained muscle contractions (face, larynx, hands, feet) called tetany.
4. Acromegaly is a GH disorder, cretinism is thyroid-linked, and glycosuria is glucose in urine, so they are ruled out.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 16 Plant and Animal Hormones "Parathyroid Dysfunction", p.243_
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