Inositol Trisphosphate (IP₃) Is Released into the Cytoplasm When Phosphatidyl

question 97

Multiple Choice

Inositol trisphosphate (IP₃) is released into the cytoplasm when phosphatidyl inositol-bisphosphate (PIP₂) is hydrolyzed.IP₃ is one type of molecule that can directly

• A) open Ca²⁺ channels and increase cytosolic calcium.
• B) close Ca²⁺ channels and deplete intracellular calcium.
• C) stimulate G protein activation of phospholipase.
• D) activate cyclic AMP.
• E) stimulate gene expression.

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