HUMAN PHYSIOLOGY: AN INTEG ACCESS C
8th Edition
ISBN: 9780134714837
Author: Silverthorn
Publisher: PEARSON
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Question
Chapter 13.3, Problem 7CC
Summary Introduction
To draw: A reflex map of the stretch reflex.
Introduction: Stretch reflex is a type of contraction that is initiated as a response to the stretching of muscle in the body. It regulates the length of the skeletal muscle, automatically and is a type of monosynaptic reflex.
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Give a labeled illustration of a simple reflex arc with its components of the patella tendon tap
reflex/knee jerk reflex.
When describing the reflex arcs and the neural pathways involved we often limit ourselves to the nerves carrying information from the muscle or tendon to the spinal cord and back. However, it should be clear from our ability to feel the tendon tap as well as the results from the Jendrassik’s maneuver test that it isn’t this simple. What other neural connections must be present ?
The motor neuron involved in reciprocal innervation of the withdrawal reflex inhibits the extensor muscles of the limb. Considering what you learned about stretch reflexes, why does this make sense?
Chapter 13 Solutions
HUMAN PHYSIOLOGY: AN INTEG ACCESS C
Ch. 13.2 - List the general steps of a reflex pathway,...Ch. 13.2 - If a cell hyperpolarizes, does its membrane...Ch. 13.3 - Prob. 3CCCh. 13.3 - Draw a reflex map of the flexion reflex initiated...Ch. 13.3 - Prob. 5CCCh. 13.3 - Prob. 6CCCh. 13.3 - Prob. 7CCCh. 13 - Prob. 1RQCh. 13 - Prob. 2RQCh. 13 - The pathway pattern that brings information from...
Ch. 13 - When the axon terminal of a modulatory neuron...Ch. 13 - Autonomic reflexes are also called _____ reflexes....Ch. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - Prob. 8RQCh. 13 - Prob. 9RQCh. 13 - Prob. 10RQCh. 13 - Prob. 11RQCh. 13 - Prob. 12RQCh. 13 - Prob. 13RQCh. 13 - Prob. 14RQCh. 13 - Prob. 15RQCh. 13 - Prob. 16RQCh. 13 - Prob. 17RQCh. 13 - At your last physical, your physician checked your...Ch. 13 - There are several theories about how presynaptic...Ch. 13 - Prob. 20RQCh. 13 - Prob. 21RQCh. 13 - Prob. 22RQ
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Similar questions
- Describe what is the Stretch Reflex?arrow_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_forwardDefine the term stretch reflex and describe how such reflexes are used to anatomically localize SCIarrow_forward
- There 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_forwardBoth the withdrawal reflex and the Golgi tendon reflex involve sensory signals that ultimately control the same type ofmotor neurons and both are protective. Explain how one reflex can cause muscle contraction while the other causes musclerelaxation.arrow_forwardwhat is typical reflex pathway containing three different nerve cell types. What function does the respective cell have?arrow_forward
- View the University of Michigan WebScope at http://virtualslides.med.umich.edu/Histology/Basic%20Tissues/ Nervous%20Tissue/068_HISTO_40X.svs/view.apml (http://openstaxcollege.org/l/nervetrunk) to explore the tissue sample in greater detail. With what structures in a skeletal muscle are the endoneurium, perineurium, and epineurium comparable?arrow_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 Reflex 2) You stimulate an alpha motor neuron and measure the force of contraction in a control muscle from a mouse. You then add Substance X, a newly synthesized product from your organic chemists. You observe that there is adecreased force of contraction following the same type of motor neuron stimulation.a. Draw your experimental setup and what force you measure before and after administering Substance X.Hint: You’ll need to include something to stimulate the muscle and something to measure the force. Whatyou measure is force upon stimulation (mN, milliNewtons) before and after addition of X.b. Hypothesize one way that Substance X could be inhibiting muscle contraction. Design an experiment…arrow_forwardFor each of the following statements about the line reflex, state whether it is true or false. The stretch reflex involves sensory neurons that switch directly to the motor neuron in the spinal cord The muscle contracts in response to a force applied Stretch reflexes include a sensory receptor (muscle coil)arrow_forward
- Modified muscle fibers serving primarily to detect stretch are calledarrow_forwardA tap on the patellar tendon at the knee joint is used to test the knee-jerk reflex. All of the followings are correct, except ---------------------. The reflex starts with the 1a sensory neurons of the muscle spindle There is an excitatory stimulus to the motor pool of the extensor muscle There is a stimulation of the excitatory interneuron of the flexor muscle Excitation of the extensor muscle fibers causes the knee extension Muscle contraction depends on coordination between motor pools of antagonistic musclesarrow_forwardSomatic reflexes involve the contraction of agonist muscles and relaxation of antagonist muscles. When the agonist muscle is stimulated to contract, the antagonist muscle is inhibited. This relationship is referred to as: O contralateral inhibition O ipsilateral inhibition O reciprocal inhibition O extensor inhibitionarrow_forward
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