AnnotateStart OverIn the image of the spinal cord below, circle the precise location where you would observe cell bodies ofmotor neurons.AnnotateStart OverWhat are two areas in the cerebral hemispheres responsible for speech? In which lobes of the brain are t

Motor neurons are neuronal cells that are present in the central nervous system (CNS) controlling a wide range of downstream targets. There are two primary types of motor neurons : i) upper motor neutrons that originate from cerebral cortex (ii) lower motor neurons found in the spinal cord and brainstem. Cell bodies of motor neurons are found in the grey matter of ventral horn of spinal cord. The motor neuron's cell body is found in the gray matter of the ventral horn, and the long axon of the neuron travels from the cord to a muscle where it forms a neuromuscular junction. These cells generate an action potential that travels along the axon, stimulates the nerve at the neuromuscular junction, and transmits that stimulation to the muscle to activate the muscle.

Answered: In the image of the spinal cord below,…

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Anatomy and Physiology

In the image of the spinal cord below, circle the precise location where you would observe cell bodies of motor neurons.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Order the steps of the neuromuscular junction transmission using the following images. Then, usethe to describe what is happening in the step. Neuromuscular Junction Transmission - Contraction 1. Action potential travels from motor neuron cell body along the myelinated axon to neuromuscular junction. 2. Acetylcholine (ACh) is released from axon (neuron), crosses synapse (space between axon and sarcolemma).ACh binds to ACh receptors (channel) in sarcolemma. 3.ACh channels open. Ions (like sodium, Na+) flow into sarcolemma.Action potential spreads in sarcolemma and into transverse tubules. 4. Action potential causes the release of calcium (Ca2+) from sarcoplasmic reticulum into sarcoplasm 5.Ca2+ goes to the troponin, which moves the tropomyosin away from actin 6. Myosin head breaks down ATP, causing the sliding filament mechanism to shorten sarcomereMuscle contracts
some blanks may be filled with more than one term; some terms may be used more than once, some terms may not be used) ACh (acetylcholine) Brainstem CN I CN II CN III CN IV CN IX CN V CN VI CN VII CN VIII CN X CN XI CN XII Ganglionic parasympathetic neurons Ganglionic sympathetic neurons Lateral horn of spinal cord segments T1-L2 Lateral gray matter of spinal cord segments S2-S4 Medulla oblongata Midbrain NE (norepinephrine) Parasympathetic Paravertebral ganglia Parasympathetic autonomic ganglia Pelvic splanchnic nerve Pons Postganglionic parasympathetic neurons Postganglionic sympathetic neurons Preganglionic parasympathetic neurons Preganglionic sympathetic neurons Prevertebral ganglia Spinal cord segment C1-C4 Spinal cord segment C5-T1 Spinal cord segment T1-L2 Spinal cord segment L1-L4 Spinal cord segment L4-S4 Spinal cord segment S2-S4 Somatic motor neurons Somatic sensory neurons Sympathetic Sympathetic chain ganglia Sympathetic trunk ganglia Visceral sensory neurons…
Match 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 here
The NerveEpineurium - BluePerineurium - RedEndoneurium - YellowAxon - PurpleFascicle - Orange
The shape of the cell bodies of upper and lower motor neurons are structurally classified as blank and blank, respectively
some blanks may be filled with more than one term; some terms may be used more than once, some terms may not be used) ACh (acetylcholine) Brainstem CN I CN II CN III CN IV CN IX CN V CN VI CN VII CN VIII CN X CN XI CN XII Ganglionic parasympathetic neurons Ganglionic sympathetic neurons Lateral horn of spinal cord segments T1-L2 Lateral gray matter of spinal cord segments S2-S4 Medulla oblongata Midbrain NE (norepinephrine) Parasympathetic Paravertebral ganglia Parasympathetic autonomic ganglia Pelvic splanchnic nerve Pons Postganglionic parasympathetic neurons Postganglionic sympathetic neurons Preganglionic parasympathetic neurons Preganglionic sympathetic neurons Prevertebral ganglia Spinal cord segment C1-C4 Spinal cord segment C5-T1 Spinal cord segment T1-L2 Spinal cord segment L1-L4 Spinal cord segment L4-S4 Spinal cord segment S2-S4 Somatic motor neurons Somatic sensory neurons Sympathetic Sympathetic chain ganglia Sympathetic trunk ganglia Visceral sensory neurons…
Put the following in the correct order from the spinal cord ventral horn. Drag and drop options into correct order and submit. For keyboard navigation... SHOW MORE ✓ III III III III Mixed spinal nerve Ventral axons Effectors on anterior portion of the body Ventral roots Ventral ramus
T/F Axons entering the spinal cord contact only one neuron. Be able to explain the rationale for your answer.
Fill in the blank: Myelin contains a high proportion of _______________________.
Choose the correct answer to fill in the blanks: The dorsal roots carry (sensory, motor, or both) information (into, away, or both) the spinal cord. Damage to a dorsal roof is most likely to cause (parenthesis, or paralysis) in the affected area. The ventral roots carry (sensory, motor, or both) information (into, away, or both) the spinal cord. Damage to a ventral roof is most likely to cause (paresthesias or paralysis) in the affected area.
___________ receive electrical impulses while ___________ conduct them to the next. regarding tranduction mechanisms in neurons.
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