Chapter 48, Problem 11TYU

Summary Introduction

To propose: Two hypotheses to explain how the anesthetics are able to block the pain sensation.

Introduction:

Pain sensation is perceived through nerve cells by electrical events known as action potential, and chemical neurotransmitters. Neurotransmitters are released at the synaptic junction between two neurons when the action potential reaches the presynaptic terminal.

The anesthetics drugs used cause reversible loss of all sensations including pain. General anesthetic causes loss of consciousness whereas; local anesthetics cause loss of sensations.