Evaluate the role of beta arrestin in the adaptation of signal transduction pathways.

• A. Beta arrestin enhances receptor activity, increasing signal transduction.
• B. Beta arrestin binds to phosphorylated receptors, leading to their internalization and attenuation of the signal.
• C. Beta arrestin has no role in signal transduction adaptation.
• D. Beta arrestin degrades receptors, terminating the signal.

Answer: (B)