Principles of Anatomy and Physiology
16th Edition
ISBN: 9781119662792
Author: Tortora, Gerard J., DERRICKSON, Bryan H.
Publisher: WILEY
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Question
Chapter 13, Problem 14CP
Summary Introduction
To review:
The mechanism and function of a stretch reflex, tendon reflex, flexor (withdrawal) reflex, and crossed extensor reflex.
Introduction:
A reflex refers to the rapid, unplanned series, and involuntary actions which takes place in response to some stimulus. There are four important somatic spinal reflexes and these involves stretch, tendon, flexor, and crossed extensor reflex.
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Chapter 13 Solutions
Principles of Anatomy and Physiology
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- Compare and contrast stretch, flexor, crossed-extensor, and tendon reflexes.arrow_forwardSeveral of the events that occur between the time a physician strikes apatient’s patellar tendon with a rubber hammer and the time the quadriceps femoris contracts (knee-jerk reflex) are listed below:(1) increased frequency of action potentials in sensory neurons(2) stretch of the muscle spindles(3) increased frequency of action potentials in the alpha motor neurons(4) stretch of the quadriceps femoris(5) contraction of the quadriceps femorisWhich of the following most closely describes the sequence ofevents as they normally occur?a. 4,1,2,3,5 c. 1,4,3,2,5 e. 4,2,3,1,5b. 4,1,3,2,5 d. 4,2,1,3,5arrow_forwardDo you think the patellar reflex would be inhibited or enhanced by actively contracting the quadriceps muscle group? With an understanding of how muscle spindle fibers work, explain how active contraction of a muscle might affect the myotactic reflex. [hint: try to elicit a knee jerk reflex when someone is doing a leg lift]arrow_forward
- A flexor withdrawal reflex shows all the following properties, except :-a- recruitmentb- prepotent c- non-fatigable d- irradiationarrow_forwardThere are reflex arcs that employ a gamma motor neuron wrapped around a muscle spindle and involve no interneurons. Which is NOT an appropriate example of these reflex arcs among the following? patellar reflex achilles reflex inverted supinator reflex C5 reflex arcsarrow_forward1) For each of the following reflexes, detail what the sensor is, the integrator, and the effector. Also note the neuronsinvolved in the reflex (like alpha motor neuron).a. Myotatic (stretch reflex)b. Autogenic Inhibition (Golgi tendon organ reflex)c. Flexor Reflexarrow_forward
- The reflex times for the Achilles Tendon Reflex and the Patellar Tendon Reflex should be different? Why?arrow_forwardExplain the crossed extensor reflex starting with a stimulus and including neural pathways and the function of the reflex.arrow_forwardIdentify and describe the five components of a somatic reflex arcarrow_forward
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