Explanation Explanation/justification for the correct answer: Option (d). Touching a hot object. Withdrawal reflexes are the polysynaptic reflexes. These are more complicated reflexes involve the interneuron in combination with the sensory and motor neurons. When a person feels a hot object, then withdraws the hand from it without giving a though about it. The heat triggers the temperature and danger receptors located in the skin. It stimulates a sensory impulse which moves to the central nervous system. Hence, the option (d) is correct. Explanation for the incorrect answer: Option (a) Striking the patellar ligament. A stretch reflex involves a single synapse between the sensory and motor neuron inside the gray matter of the spinal cord...

4th Edition

ISBN: 9781266871016

Author: Martin

Publisher: MCG

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Question

Chapter 29, Problem 4PL

Summary Introduction

Introduction: The spinal cord can be defined as the cylindrical bundle of the nerve fibers and connected tissue. It is surrounded in the spinal region and joins approximately all the body parts to the brain. It forms the central nervous system with the brain.

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Chapter 29, Problem 3PL

Chapter 29, Problem 5PL

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Chapter 29 Solutions

LAB MANUAL FOR HUMAN A&P MAIN VERSION

Ch. 29 - The impulse over a motor neuron will lead to a. an...Ch. 29 - Stretch reflex receptors are called a. effectors....Ch. 29 - Stretch reflexes include ail of the following...Ch. 29 - Prob. 4PL Ch. 29 - Prob. 5PL Ch. 29 - The quadriceps femoris is the effector muscle of...Ch. 29 - The posterior roots of spinal nerves contain the...Ch. 29 - The normal patellar reflex response involves...Ch. 29 - A withdrawal reflex employs...Ch. 29 - Interneurons in a withdrawal reflex are located in...

Ch. 29 - A reflex arc begins with the stimulation of a...Ch. 29 - Effectors of somatic reflex arcs are...Ch. 29 - Prob. 2.5A Ch. 29 - The effector muscle of the patellar reflex is the...Ch. 29 - The sensory stretch receptors (muscle spindles) of...Ch. 29 - The posterior root of a spinal nerve contains the...Ch. 29 - The normal plantar reflex results in...Ch. 29 - Stroking the sole of the foot in infants results...Ch. 29 - In a stretch reflex arc, when the agonist muscle...Ch. 29 - Synapses, whether excitatory or inhibitory, occur...Ch. 29 - Prob. 2.13A Ch. 29 - Prob. 2.14A

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The spinal cord can be defined as the cylindrical bundle of the nerve fibers and connected tissue. It is surrounded in the spinal region and joins approximately all the body parts to the brain. It forms the central nervous system with the brain.

Solution Summary: The author explains that the spinal cord is the cylindrical bundle of nerve fibers and connected tissue. Withdrawal reflexes involve the interneuron in combination with the sensory and motor neurons.

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Introduction: The spinal cord can be defined as the cylindrical bundle of the nerve fibers and connected tissue. It is surrounded in the spinal region and joins approximately all the body parts to the brain. It forms the central nervous system with the brain.

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