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

How calcium affect the process of muscle contraction?

How fall and rise in blood calcium stimulates secretion of parathyroids?

What is the role if calcium ions, troponin and F-Actin during contraction of striated muscles of humans?

These questions consist of two statements each,printed as Assertion and Reason.While answering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Cartilage(protein matrix)and bone (calcium matrix) are rigid connective tissues. Reason:Blood is conncective tissue in which plasma is matrix.

Why must a cell be made 'competent' in biotechnology experiments? How does calcium ion help in doing so?

If E^@ for copper electrode is +0.34V, how will you calculate e.m.f. value when the solution in contact with it is 0.1 M in copper ions? How does e.m.f. for copper electrode change when concentration of Cu^(2+) ion in the solution is decreased?