Motor neurons have many functions, which include to: Carry a nerve impulse away from the CNS Send sensory information to the CNS Detect a stimulus from a sensory receptor Transmit a nerve impulse to an interneuron Take an impulse from an effector to a sensory neuron

Motor neurons have many functions, which include to: Carry a nerve impulse away from the CNS Send sensory information to the CNS Detect a stimulus from a sensory receptor Transmit a nerve impulse to an interneuron Take an impulse from an effector to a sensory neuron

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter7: The Peripheral Nervous System: Efferent Division

Section: Chapter Questions

Problem 4TAHL

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Question

Motor neurons have many functions, which include to:
Carry a nerve impulse away from the CNS
Send sensory information to the CNS
Detect a stimulus from a sensory receptor
Transmit a nerve impulse to an interneuron
Take an impulse from an effector to a sensory neuron

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Anatomically, the motor endplate potential is characterized by synaptic boutons active zones junctional folds Ach receptor-channels all the above
γ-motor neuron discharge to a muscle is inhibited by impulses reaching the γ-motor neurons from all the following source, except :-a- Golgi tendon organs of the same muscleb- spindles of antagonistic musclesc- medullary reticular formationd- pontine reticular formation
Somatic sensory and somatic motor information are propagated via specialized neurons. If you dip your toes in a hot tub before entering the tub, the action potentials generated by the water temperature travels via which of the following structures before it can be perceived by you? O unipolar neurons from the toes to the spinal nerve, ventral root, spinal cord, thalamus, primary somatosensory cortex O unipolar neurons from the toes to the spinal nerve, dorsal root, spinal cord, thalamus, primary somatosensory cortex O multipolar neurons from the toes to the spinal nerve, ventral root, spinal cord, thalamus, primary somatosensory cortex O multipolar neurons from the toes to the spinal nerves, dorsal root, spinal cord, thalamus, primary somatosensory cortex
Co-activation of α and γ-motor neurons :-a- increases γ-motor neuron discharge whenever the activity of α-motor neurons rises to a high levelb- is mediated by interneurons that link the α and γ-motor neuronsc- maintains the proprioceptive information to higher centers during muscle contractiond- increases the α-motor neuron discharge whenever the activity of γ-motor neurons rises to a high level
The central ends of afferents from muscle spindles synapse with all the following types of neurons, except :-a- α-motor neurons of the same muscleb- γ-motor neurons of the same musclec- local interneuronsd- 2nd order neurons of ascending sensory pathways
Which of the following statements regarding the motor end plate in the somatic motor division of the nervous system is true? After the activation of voltage-gated calcium channels, the neuron releases ACh onto the muscarinic receptors on the surface of the highly folded area of the muscle fibre. The preganglionic nerve fibre releases ACh onto the postganglionic nerve fibre, which then releases ACh onto the cholinergic receptors of the motor end plate. Chemically gated monovalent cation channels on the motor end plate are activated once the motor neuron releases ACh onto the nicotinic receptors on the surface of the muscle cell. The AChE enzyme enhances the amount of ACh released into the neuromuscular junction
Increased γ-motor neuron discharge stimulates muscle spindles, because :-a- it produces stretch of the extrafusal muscle fibersb- it causes stretch of the peripheral regions of the intrafusal fibersc- it causes stretch of the central region of the intrafusal fibersd- it stimulates directly the sensory fibers innervating muscle spindles
The motor end plate is extensively folded to allow for greater number of what structure? Terminal cisternae Transverse tubules Cholinergic receptors Myofibrils
There are two pathways by which the Jendrassik maneuver facilitates alpha motor neuron output. Describe one.
Sort the structures that the action potential would pass through after being generated by the first order sensory neuron. Drag and drop options into correct order and submit. thalamus anterior ramus of spinal nerve posterior root and rootlets somatosensory cortex of the cerebrum posterior funiculus brainstem brachial plexus posterior grey horn ||| ||| = ||| = ||| = ||| = ||| ||| ||| =
Lower motor neuron lesions cause all the following, except :-a- decreased number of transmitter receptors in the denervated muscleb- atrophy of the denervated musclec- flaccid paralysis of the denervated muscled- loss of flexion withdrawal reflex
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