Increasing Cytosolic [Ca²⁺] Is More Useful as a Signaling Mechanism

question 15

Multiple Choice

Increasing cytosolic [Ca²⁺] is more useful as a signaling mechanism than Increasing [Na⁺] or [K ⁺] or [Cl^-] because

• A) Far fewer Ca²⁺ ions need to flow because intracellular [Ca²⁺] is so low
• B) Ca²⁺ can bind to specific proteins
• C) Unlike the other ions, Ca²⁺ can activate phosphorylation of proteins
• D) The Increase in [Ca²⁺] can be short-lived
• E) All of the above

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