A&P UNITY AND FUNCTION ACCESS
9th Edition
ISBN: 9781264893683
Author: SALADIN
Publisher: MCG
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Textbook Question
Chapter 13, Problem 4TYR
A stretch reflex requires the action of _______ to prevent an antagonistic muscle from interfering with the agonist.
- a. gamma motor neurons
- b. a withdrawal reflex
- c. a crossed extension reflex
- d. reciprocal inhibition
- e. a contralateral reflex
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Students have asked these similar questions
In the stretch reflex,a. Golgi tendon organs activate contraction in extrafusal muscle fibersconnected to that tendon.b. lengthening of muscle-spindle receptors in a muscle leads tocontraction in an antagonist muscle.c. action potentials from muscle-spindle receptors in a muscle formmonosynaptic excitatory synapses on motor neurons to extrafusal fiberswithin the same muscles.d. slackening of intrafusal fibers within a muscle activates gamma motorneurons that form excitatory synapses with extrafusal fibers within thatsame muscle.e. afferent neurons to the sensorimotor cortex stimulate the agonist muscle to contract and the antagonist muscle to be inhibited
Which of the following is NOT a reason why a reflex arc is faster than a normal nerve transmission?
a. A reflex arc stimulates the motor neurons for an immediate reaction.
b. A reflex arc does not send information to the brain to be processed.
c. A reflex arc does not involve neurotransmitters.
d. A reflex arc involves fewer neurons.
If a stretch reflex is activated, the muscle will
a.
lengthen.
b.
relax.
c.
shorten.
d.
none of above
Chapter 13 Solutions
A&P UNITY AND FUNCTION ACCESS
Ch. 13.1 - Prob. 1BYGOCh. 13.1 - Prob. 2BYGOCh. 13.1 - Prob. 3BYGOCh. 13.1 - Prob. 4BYGOCh. 13.1 - Prob. 5BYGOCh. 13.1 - Prob. 1AYLOCh. 13.1 - Prob. 2AYLOCh. 13.1 - Prob. 3AYLOCh. 13.1 - Prob. 4AYLOCh. 13.1 - Prob. 5AYLO
Ch. 13.1 - Prob. 6AYLOCh. 13.1 - Prob. 7AYLOCh. 13.1 - Prob. 8AYLOCh. 13.1 - The position of the posterior and anterior horns...Ch. 13.1 - Prob. 10AYLOCh. 13.1 - Prob. 11AYLOCh. 13.1 - Prob. 12AYLOCh. 13.1 - Names and functions of the descending tractsCh. 13.1 - Prob. 14AYLOCh. 13.1 - Prob. 15AYLOCh. 13.1 - Prob. 16AYLOCh. 13.2 - Prob. 6BYGOCh. 13.2 - Prob. 7BYGOCh. 13.2 - Prob. 8BYGOCh. 13.2 - Prob. 9BYGOCh. 13.2 - Prob. 1AYLOCh. 13.2 - Prob. 2AYLOCh. 13.2 - Prob. 3AYLOCh. 13.2 - Prob. 4AYLOCh. 13.2 - Prob. 5AYLOCh. 13.2 - Prob. 6AYLOCh. 13.2 - Prob. 7AYLOCh. 13.2 - Prob. 8AYLOCh. 13.2 - Prob. 9AYLOCh. 13.2 - Prob. 10AYLOCh. 13.2 - Prob. 11AYLOCh. 13.2 - Prob. 12AYLOCh. 13.3 - Name five structural components of a typical...Ch. 13.3 - State the function of each of the following in a...Ch. 13.3 - Prob. 12BYGOCh. 13.3 - Prob. 13BYGOCh. 13.3 - Prob. 14BYGOCh. 13.3 - Prob. 1AYLOCh. 13.3 - The pathway and constituents of a somatic reflex...Ch. 13.3 - Prob. 3AYLOCh. 13.3 - Structure and function of muscle spindlesCh. 13.3 - Stretch reflexes; one or more examples; the...Ch. 13.3 - Prob. 6AYLOCh. 13.3 - Prob. 7AYLOCh. 13.3 - Prob. 8AYLOCh. 13.3 - Prob. 9AYLOCh. 13 - Below L2. the vertebral canal is occupied by a...Ch. 13 - Prob. 2TYRCh. 13 - Nerve fibers that adjust the tension in a muscle...Ch. 13 - A stretch reflex requires the action of _______ to...Ch. 13 - Prob. 5TYRCh. 13 - Prob. 6TYRCh. 13 - Prob. 7TYRCh. 13 - Prob. 8TYRCh. 13 - Prob. 9TYRCh. 13 - Prob. 10TYRCh. 13 - Prob. 11TYRCh. 13 - Prob. 12TYRCh. 13 - The cerebellum receives feedback from the muscles...Ch. 13 - In the ______ reflex, contraction of flexor...Ch. 13 - Prob. 15TYRCh. 13 - Prob. 16TYRCh. 13 - Prob. 17TYRCh. 13 - Prob. 18TYRCh. 13 - Prob. 19TYRCh. 13 - Prob. 20TYRCh. 13 - arachno-Ch. 13 - Prob. 2BYMVCh. 13 - Prob. 3BYMVCh. 13 - Prob. 4BYMVCh. 13 - Prob. 5BYMVCh. 13 - Prob. 6BYMVCh. 13 - Prob. 7BYMVCh. 13 - Prob. 8BYMVCh. 13 - Prob. 9BYMVCh. 13 - tecto-Ch. 13 - Prob. 1WWTSCh. 13 - Prob. 2WWTSCh. 13 - Prob. 3WWTSCh. 13 - Some spinal nerves are sensory and others are...Ch. 13 - Prob. 5WWTSCh. 13 - The anterior and posterior horns of the spinal...Ch. 13 - Prob. 7WWTSCh. 13 - Prob. 8WWTSCh. 13 - Prob. 9WWTSCh. 13 - Prob. 10WWTSCh. 13 - Jillian is thrown from a horse. She strikes the...Ch. 13 - Wallace is the victim of a hunting accident. A...Ch. 13 - Anthony gets into a fight between rival gangs As...Ch. 13 - Stand with your right shoulder, hip, and foot...Ch. 13 - When a patient needs a tendon graft, surgeons...
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- Motor neurons are crucial for movement, what would happen if the motor neurons would be destroyed. a. How would this affect our reflexes b. Research illnesses that affect Motor Neuronsarrow_forwardIncreased frequency of stimulation resulting in increased tension in a motor unit is A. recruitment B. spatial summation C. multiple motor unit summation D. temporal summationarrow_forwardAll motor neurons release acetylcholine as a neurotransmitter except a. Postganglionic sympathetic neurons b. Somatic motor neurons c. Postganglionic parasympathetic neurons d. Specific cardiac and smooth muscle fibersarrow_forward
- Neurons in the ________ control motor reflexes. a. thalamus b. spinal cord c. parietal lobe d. hippocampusarrow_forwardResponse to a stimulus within the central nervous system differs from that of a reflex arc because a. Depolarization deos not occur along the reflex arc b. No acetylcholine is released in the central nervous system c. There is no interpretation of the information within the reflex arc d. Nerve impulses travel in the central nervous system at a greater speedarrow_forwardWhen a higher voltage is applied to the skeletal muscle, the force of contraction _____ and recruitment of more motor units occurs called ________ summation. A. increases, spatial B. increases, temporal C. decreases, temporal D. decreases, spatialarrow_forward
- Fill in the blankes The somatic motor neurons innervating the __________________ of the lower limbs are located in the _________________ of the spinal cord. A. smooth muscles; lumbar region B. skeletal muscles; cervical region C. skeletal muscles; lumbar region D. skin; cervical regionarrow_forwardMRI of a 36-year-old woman in a car collison indicates a lesion in the flocculonadular lobe. Which deficit is she most likely to exhibit? a. Loss of position sense b. Nystagmus c. Leg but not arm weakness d. Arm but not leg weaknessarrow_forwardA half-second stimulation in the motor cortex produces what kind of result?A. Isolated muscle twitchesB. Contraction of a particular combination of musclesC. Contraction of whatever muscles are necessary to produce a particular outcomeD. Contractions of different muscles that vary unpredictably from one trial to anotherarrow_forward
- Which statement(s) about human neuromuscular innervation is/are true? A. A single spinal motor neuron innervates multiple muscle fibers. B. The majority muscle fibers are innervated by two or more motor neurons. C. Polyneuronal innervation of adult muscles fibers is possible, but rather rare. D. Each spinal motor neuron innervates a single skeletal muscle fiber.arrow_forwardThe muscle relaxes if no new nerve signal arrives. However the neurotransmitter from the previous stimulation is still present in the synapse. The activity of ________ helps to remove this neurotransmitter. a. myosin b. action potential c. tropomyosin d. acetylcholinesterasearrow_forwardif, in a laboratory, a skeletal muscle cell receives a single stimulus to contract, it produces a single muscle twitch. If we quickly fire another stimulus for the muscle to contract, prior to the muscle fully relaxing, then we have a condition of: A. seizure B. none of the above C. complete tetanus D. temporal summation E. relaxation The _________________ phase of the Sliding Filament Model of Contraction occurs when myosin and actin separate from one another. A. cocking of the myosin head B. cross bridge detachment C. cross bridge formation D. action potential E. calcium release During contraction, the bulk of calcium comes from the?arrow_forward
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