HUMAN PHYSIOLOGY: AN INTEG ACCESS C
8th Edition
ISBN: 9780134714837
Author: Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 13.3, Problem 4CC
Draw a reflex map of the flexion reflex initiated by a painful stimulus to the sole of a foot.
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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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- What might happen if you could suddenly stimulate gamma motor neurons to leg flexor muscles in a resting position?arrow_forwardDraw a muscle spindle surrounded by a few extrafusal fibers. Indicate the location of primary and secondary sensory endings and explain how these endings respond to musclestretch.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_forward
- Where are the lower motor neuron cell bodies that innervate the medial rectus muscle located? Abducens nucleus Oculomotor nucleus Facial nucleus Trochlear nucleusarrow_forwardExplain why α‒γ coactivation is important for quality control of voluntary motions.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_forward
- A 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_forwardThe role of muscle spindles in the maintenance of the upright posture depends upon all the following, except :-a- contraction of the peripheral contractile part of spindle fibersb- increased sensory discharge from spindles of postural musclesc- increased supraspinal facilitation to the γ-motor neurons of postural musclesd- presence of greater numbers of spindles in postural musclesarrow_forwardExaggeration of tendon jerks could result from any of the following conditions, except :-a- lesions of supraspinal facilitatory centersb- lesions of supraspinal inhibitory centersc- increased γ-motor neuron discharged- anxietyarrow_forward
- Muscle spindles are the sensory receptors that monitor the length of skeletal muscles. When the length of the hamstrings changes between standing and seated positions, which structure is responsible for adjusting the length of the intrafusal muscle fibers of the muscle spindle? Group of answer choices beta motor neurons gamma motor neurons extrafusal fibers alpha motor neuronsarrow_forwardDiscuss Conceptual Motor Control Hierarchy for Voluntary Movements?arrow_forwardWhile crawling across a floor, a child accidentally places her right hand onto a piece of broken glass. How will the flexor muscles of her left arm respond?arrow_forward
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