In which of the following forms does Ca²⁺ exhibit profound effects on such things as neuromuscular excitability
A)as free, unbound, diffusible Ca²⁺
B)as intracellular Ca²⁺
C)as calcium phosphate crystals impregnated in the organic matrix of bone
D)as calcium bound to plasma proteins

Question

Quizplus · Accepted Answer

Free, unbound, diffusible Ca²⁺ is the form that directly affects neuromuscular excitability, as it is the active form that can interact with cellular components and influence physiological processes.

In Which of the Following Forms Does Ca²⁺ Exhibit Profound