Question

what is the stage labeled \x\ called? ©2021 pearson education, inc. signal reception trigger signal transduction

Explanation:

The image shows a molecule binding to a receptor on a cell - membrane, which is the initial step in cell - signaling. This initial step is signal reception. Signal transduction occurs after reception and involves a series of molecular changes. A trigger is a more general term and not the specific stage here.

Answer:

signal reception