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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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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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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- The 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_forwardWhich body regions are controlled by the largest areas of motor cortex—regions with a few large muscles or regions with numeroussmall muscles?arrow_forwardFor 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_forward
- Supplemental motor area is involved in all the following functions, except :-a- adjusting postureb- orienting responsesc- motor programmingd- coordinating bilateral movementsarrow_forwardExplain the descending pathway from the brain where Mr. Dexter decides to move his right leg to the actual movement of his quadriceps. (Use complete sentences.) Use key words in this order: primary motor cortex in precentral gyrus, frontal lobe, descending tract, decussate, ventral horn with motor neuron in lumbar spinal cord, ventral root, spinal nerve, sciatic nerve in lumbosacral plexus, muscles to move leg (ie. quadriceps)to take a step.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
- Compare upper motor neurons with lower motor neurons.arrow_forwardMatch functions with parts of the central nervous system (CNS) This structure regulates voluntary movements (checks what the brain has instructed against what is actually happening) The primary motor area is located here This structure is a major sensory relay centre Thirst and satiety centres are located herearrow_forwardLoss of sensation to the thumb is indicative of injury to which nerve? median Oaxillary ulnar musculocutaneous.arrow_forward
- A technician is drawing blood from your arm for blood tests. As you feel the pain of the needle, you suppress your flexor reflex. Name the ascending pathway that carries pain signals and the region of the cortex that receivesthem (use Figure). Next, name the descending pathway you would use to inhibit the flexor reflex (use Figure).arrow_forwardFill in the blanks: The cell bodies of upper motor neurons reside in the __________ and function to __________, whereas the cell bodies of lower motor neurons reside in the __________ and function to___________________arrow_forwardWhich of the following would result in no movement (i.e. no activation of the motor cortex)? Stimulation of D2 Medium Spiny Neurons Stimulation of D1 Medium Spiny Neurons Inhibition of the Globus Pallidus Interna Inhibition of the Globus Pallidus Externa Both A & D are correctarrow_forward
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