A patient has a mutation that causes overactivation of the Gq protein in the PSP pathway. What potential cellular response might you expect?

• A. Inhibition of phospholipase C activity.
• B. Reduced production of IP3 and DAG.
• C. Decreased calcium release from the endoplasmic reticulum.
• D. Increased activation of protein kinase C, leading to enhanced cellular responses.

Answer: (D)