Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 12, Problem 39CTQ
If a person has a motor disorder and cannot move their aim voluntarily, but their muscles have tone, which motor neuron—upper or lower—is probably affected? Explain why.
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If a person has a motor disorder and cannot move their arm voluntarily, but their muscles have tone, which motor neuron—upper or lower—is probably affected? Explain why.
Higher motor commands originate in all the following centers, except :-a- cerebral cortexb- thalamusc- caudate nucleusd- cerebellum
Interneurons can act as “switches” that enable a movement to be turned on or off under the command of higher motor centers. How? Explain with an example?
Chapter 12 Solutions
Anatomy & Physiology
Ch. 12 - In 2003, the Nobel Prize in Physiology or Medicine...Ch. 12 - Visit this site...Ch. 12 - Visit this site...Ch. 12 - View the University of Michigan Webscope...Ch. 12 - What happens across the membrane of an...Ch. 12 - Visit this site...Ch. 12 - Watch this video...Ch. 12 - Watch this video...Ch. 12 - Which of the following cavities contains a...Ch. 12 - Which structure predominates in the white matter...
Ch. 12 - Which part of a neuron transmits an electrical...Ch. 12 - Which term describes a bundle of axons in the...Ch. 12 - Which functional division of the nervous system...Ch. 12 - What type of glial cell provides myelin for the...Ch. 12 - Which part of a neuron contains the nucleus?...Ch. 12 - Which of the following substances is least able to...Ch. 12 - What type of glial cell is the resident macrophage...Ch. 12 - What two types of macromolecules are the main...Ch. 12 - If a thermoreceptor is sensitive to temperature...Ch. 12 - Which of these locations is where the greatest...Ch. 12 - How long does all the signaling through the...Ch. 12 - What is the target of an upper motor neuron?...Ch. 12 - What ion enters a neuron causing depolarization of...Ch. 12 - Voltage-gated Na+ channels open upon leaching what...Ch. 12 - What does a ligand-gated channel require in order...Ch. 12 - What does a mechanically gated channel respond to?...Ch. 12 - Which of the following voltages would most likely...Ch. 12 - Which of the following is probably going to...Ch. 12 - How much of a change in the membrane potential is...Ch. 12 - A channel opens on a postsynaptic membrane that...Ch. 12 - What neurotransmitter is released at the...Ch. 12 - What type of receptor requires an effector protein...Ch. 12 - Which of the following neurotransmitters is...Ch. 12 - What responses are generated by the nervous system...Ch. 12 - When eating food, what anatomical and functional...Ch. 12 - Multiple sclerosis is a demyelinating disease...Ch. 12 - Which type of neuron, based on its shape, is best...Ch. 12 - Sensory fibers, or pathways, are referred to as...Ch. 12 - If a person has a motor disorder and cannot move...Ch. 12 - What does it mean for an action potential to be an...Ch. 12 - The conscious perception of pain is often delayed...Ch. 12 - If a postsynaptic cell has synapses from five...Ch. 12 - Why is the receptor the important element...
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- Sin Young incorrectly classified proprioception as general somatic motor because it refers to the innervation of muscles. Actually, proprioception is general somatic sensory. Explain why.arrow_forwardThe primary motor area projects efferent fibers to all the following centers, except :-a- 1ry somatic sensory areab- premotor area c- supplemental motor aread- brainstem motor nucleiarrow_forwardCoordination and timing of movements and balance are functions of which of the following brain structures? a- basal ganglia b- motor cortex c- midbrain motor centers d- cerebellumarrow_forward
- All of the following are descending motor tracts, except :-a- Rubrospinal tractb- Spinotectal tractc- Reticulospinal tractd- Corticobulbar tractarrow_forwardWhich body regions are controlled by the largest areas of motor cortex—regions with a few large muscles or regions with numeroussmall muscles?arrow_forwardWhen playing soccer what pathway is involved in activating your leg muscles to kick the ball: Ascending pathway Crticospinal pathway Spinothalamic pathway Dorsal column-medial lemniscal pathwayarrow_forward
- For each of the following body regions, name the peripheral nerve that carries somatic motor fibers to most of the skeletal muscles: flexor surface of the arm flexor surface of the forearm extensor surface of the arm and forearm anterior thigh posterior thigh anterior leg posterior legarrow_forwardSupplemental motor area is involved in all the following functions, except :-a- adjusting postureb- orienting responsesc- motor programmingd- coordinating bilateral movementsarrow_forwardA neuron stimulating the biceps brachii (muscle at the arm) to contract belongs to visceral motor division visceral sensory division somatic motor division somatic sensory division O000arrow_forward
- A patient with a cerebral lesion exhibits loss of fine motor control ofthe left hand, arm, forearm, and shoulder. All other motor and sensoryfunctions appear to be intact. Describe the location of the lesion asprecisely as possiblearrow_forwardAn individual sustains injuries to only the ascending tract of the spinal cord.will this person experience deficits in movement,sensation,both or neither?explain.arrow_forwardSort 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 ||| ||| = ||| = ||| = ||| = ||| ||| ||| =arrow_forward
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