Locomotion and Movement Question 49
49. Parathormone deficiency produces muscle ramps or tetany as a result of
(a) lowered blood $Ca^{2+}$
(b) enhanced blood $Na^{+}$
(c) enhanced blood glucose
(d) enhanced blood $Ca^{+}$
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Answer : a
Hints & Solutions
(a) Parathormone released by the parathyroid gland elevates the level of $Ca^{2+}$ in blood. The deficiency of this hormone lowers blood $Ca^{2+}$. As a result, the excitability of muscles and nerves increases causing tetany -sustained contraction.
