Chapter 16, Problem 66TQ

Summary Introduction

To review:

The necessity of signal cascade, and the reason behind the lack of a simple molecular mechanism between the hormone and the cellular effect.

Introduction:

Cell signaling, or signal transduction, is the transmission of cellular signals from the external environment to the internal parts of a cell. It occurs in three different phases, namelyreception, transduction, and response. In the first phase of signal transduction, the cell-surface receptor receives the signal molecule. There are two types of cell-surface receptors, namelyG protein-coupled receptorsand receptor tyrosine kinases.