Chapter 6, Problem 21RQ

a.

Summary Introduction

Introduction: Receptors are the proteins that have a specific site called the binding site that facilitates binding of the ligand. The binding site of the receptor is highly specific and allows only a single molecule or a class of molecule to attach to the receptor.

b.

Summary Introduction

To determine: The differences between neurotransmitter and neurohormone.

Introduction: Cell signaling is important for establishing coordination between the different cells for an organized functioning of the body. The signaling molecules play an important role in cell signaling. These molecules are released by the synapses or produced by certain organs that bind to the receptors present inside or outside the cell and induce changes in the functioning of the cell.

c.

Summary Introduction

To determine: Which among acetylcholine or epinephrine chemical messenger is secreted in higher concentration.

Introduction: The role of the receptor is to identify the signaling molecules and to attach them to the binding site present on them. Sometimes, more than one molecule binds to the binding site, and these molecules may be an antagonist or agonist.

Summary Introduction

To determine: The reason for the release of higher concentration of epinephrine.

Introduction: Hormones are the chemical messengers that induce metabolic changes in the cell by binding to their cell surface receptors. They can either travel to the nearby cells or it can also travel through the blood and reach the target cells present at different locations.