Biology

The correct answer is: B.Transduction.

Explanation:

In cell signaling, the process is typically divided into three main steps:

A.Reception: A signaling molecule (ligand) binds to a receptor on the cell surface (or inside the cell), which triggers the initial step of the signaling cascade. This step is where the signal is first detected, but no secondary messengers are yet involved.

B.Transduction: This is the phase where the signal is relayed inside the cell. During transduction, secondary messengers (like cyclic AMP (cAMP), calcium ions (Ca²⁺), or ino...