Calcium ion concentration in blood affects muscle contraction. Does it lead to tetany in certain cases? How will you correlate fluctuation in blood calcium with tetany?

(N/A) Muscle contraction requires the exposure of the active sites on the thin filament. This occurs when $Ca^{2+}$ ions bind to the regulatory protein troponin,forming a $Ca^{2+}-troponin$ complex.
This complex causes a conformational change in tropomyosin,which shifts to expose the myosin-binding sites on the actin filament.
Once these sites are exposed,myosin heads bind to actin,and the filaments slide over each other,resulting in muscle contraction.
When the $Ca^{2+}$ concentration in the cytosol decreases,the binding sites are covered again,and contraction ceases.
Tetany is a condition characterized by involuntary muscle spasms or contractions.
It is caused by a low level of $Ca^{2+}$ in the body fluids,often resulting from the hyposecretion of the parathyroid hormone $(PTH)$ due to the underactivity of the parathyroid gland.
Since $PTH$ is responsible for maintaining blood calcium levels,its deficiency leads to hypocalcemia,which causes increased neuromuscular excitability,leading to tetany.