To draw: The neuronal circuit representing the reflex that pulls the hand when the finger is pricked and, label the neurons, direction of information flow and location of synapses. Introduction : The body involuntarily reacts to a stimulus through reflex action. It includes the signals carried by nerve cells from receptor organs to the central nervous system (CNS) and then back to effector organs. Afferent (sensory) neurons carry information to CNS (brain or spinal cord), and efferent (motor) neurons carry information back to effector. It forms a neuronal circuit. In some cases, interneurons are present that relay signals between sensory or motor neurons and CNS.

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Chapter 49, Problem 7TYU

(a)

Summary Introduction

To draw: The neuronal circuit representing the reflex that pulls the hand when the finger is pricked and, label the neurons, direction of information flow and location of synapses.

Introduction:

The body involuntarily reacts to a stimulus through reflex action. It includes the signals carried by nerve cells from receptor organs to the central nervous system (CNS) and then back to effector organs. Afferent (sensory) neurons carry information to CNS (brain or spinal cord), and efferent (motor) neurons carry information back to effector. It forms a neuronal circuit. In some cases, interneurons are present that relay signals between sensory or motor neurons and CNS.

(b)

Summary Introduction

To draw: Brain diagram indicating the area where the pain would be perceived.

Introduction:

The body involuntarily reacts to a stimulus through reflex action. It includes the signals carried by nerve cells from receptor organs to the central nervous system (CNS) and then back to effector organs. Afferent (sensory) neurons carry information to CNS (brain or spinal cord), and efferent (motor) neurons carry information back to effector. It forms a neuronal circuit. In some cases, interneurons are present that relay signals between sensory or motor neurons and CNS.

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