Unit 4 Part 3 Questions
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Questions and Answers

Which division of the Autonomic Nervous System (ANS) prepares the body for physical activity?

  • Parasympathetic division
  • Cervical division
  • Thoracic division
  • Sympathetic division (correct)

    • How many pairs of spinal nerves form 5 plexuses to serve specific regions of the body?

  • 31 pairs (correct)
  • 8 pairs
  • 5 pairs
  • 12 pairs

    • Which part of the spinal cord contains gray matter with sensory and motor horns?

  • Cervical enlargement (correct)
  • Sacral region
  • White matter
  • Lumbar region

    • What is the function of the sympathetic division of the Autonomic Nervous System (ANS)?

    <p>Prepares the body for physical activity</p> Signup and view all the answers

    Which part of the spinal cord is divided into cervical, thoracic, lumbar, and sacral regions?

    <p>Spinal cord</p> Signup and view all the answers

    What does the Autonomic Nervous System (ANS) control?

    <p>Involuntary functions of glands, cardiac muscles, and smooth muscles</p> Signup and view all the answers

    Which division of the Autonomic Nervous System (ANS) calms body functions?

    <p>Parasympathetic division</p> Signup and view all the answers

    What do cortical pathways include?

    <p>Somatic sensory and motor pathways</p> Signup and view all the answers

    What does the sympathetic division of the Autonomic Nervous System (ANS) use to prepare the body for physical activity?

    <p>Different neurotransmitters and receptors</p> Signup and view all the answers

    What does the cerebellum coordinate?

    <p>Motor activities at multiple levels</p> Signup and view all the answers

    Which part of the spinal cord involves upper and lower motor neurons and includes the corticospinal and corticobulbar tracts?

    <p>Somatic motor pathways</p> Signup and view all the answers

    What is the function of the parasympathetic division of the Autonomic Nervous System (ANS)?

    <p>Calms body functions</p> Signup and view all the answers

    Which receptor serves as a proprioceptor and monitors the position and movement of body parts?

    <p>Muscle spindle</p> Signup and view all the answers

    Which reflex helps to maintain equilibrium and posture by stabilizing joints?

    <p>Stretch (myotactic) reflex</p> Signup and view all the answers

    Which reflex arc uses an ipsilateral pathway for stimulus and response?

    <p>Flexor reflex</p> Signup and view all the answers

    What is the function of the crossed extension reflex?

    <p>Maintains balance by extending the other limb</p> Signup and view all the answers

    What type of reflex pathway involves signals traveling over many synapses on their way to the muscle?

    <p>Polysynaptic reflex arc</p> Signup and view all the answers

    What are tendon organs?

    <p>Proprioceptors in a tendon near its junction with a muscle</p> Signup and view all the answers

    What is the response to excessive tension on the tendon?

    <p>Inhibits the muscle from contracting strongly</p> Signup and view all the answers

    Where are integrative centers located?

    <p>Gray matter of the cord or brainstem</p> Signup and view all the answers

    What do efferent nerve fibers carry?

    <p>Motor impulses to muscles</p> Signup and view all the answers

    What is the function of afferent nerve fibers?

    <p>Carry information from receptors to the brainstem</p> Signup and view all the answers

    What is the role of effectors in a reflex arc?

    <p>The muscles that carry out the response</p> Signup and view all the answers

    What is the primary function of the stretch (myotactic) reflex?

    <p>Helps maintain equilibrium and posture</p> Signup and view all the answers

    What is the primary function of a muscle spindle?

    <p>To monitor position and movement of body parts</p> Signup and view all the answers

    Which reflex helps to maintain equilibrium and posture by stabilizing joints?

    <p>Stretch reflex</p> Signup and view all the answers

    What is the function of afferent nerve fibers?

    <p>To carry information from receptors to the brainstem</p> Signup and view all the answers

    What is the role of effectors in a reflex arc?

    <p>To be the muscles that carry out the response</p> Signup and view all the answers

    What is the function of the crossed extension reflex?

    <p>To maintain balance by extending the other leg</p> Signup and view all the answers

    What is the function of the tendon reflex?

    <p>To moderate muscle contraction before it tears the tendon</p> Signup and view all the answers

    Where are integrative centers located in the reflex arc?

    <p>In the gray matter of the cord or brainstem</p> Signup and view all the answers

    What is the function of efferent nerve fibers in a reflex arc?

    <p>To carry motor impulses to muscles</p> Signup and view all the answers

    What is the function of the flexor reflex?

    <p>To trigger contraction of the flexors and relaxation of the extensors in the limb</p> Signup and view all the answers

    What is the function of tendon organs?

    <p>To serve as proprioceptors and be involved in the tendon reflex</p> Signup and view all the answers

    What type of reflex pathway involves signals traveling over many synapses on their way to the muscle?

    <p>Polysynaptic reflex arc</p> Signup and view all the answers

    What is the function of afferent nerve fibers in a reflex arc?

    <p>To carry information from receptors to the brainstem</p> Signup and view all the answers

    Which division of the Autonomic Nervous System (ANS) controls involuntary functions of glands, cardiac muscles, and smooth muscles?

    <p>Sympathetic division</p> Signup and view all the answers

    Which part of the spinal cord coordinates motor activities at multiple levels and is involved in preparing for movement and fine-tuning movements?

    <p>Cerebellum</p> Signup and view all the answers

    How many pairs of spinal nerves form 5 plexuses to serve specific regions of the body?

    <p>32 pairs</p> Signup and view all the answers

    What is the primary function of the corticospinal and corticobulbar tracts in the somatic motor pathways?

    <p>Voluntary motor control</p> Signup and view all the answers

    Which division of the Autonomic Nervous System (ANS) calms body functions?

    <p>Parasympathetic division</p> Signup and view all the answers

    What type of pathways involve functional maps of the primary somatosensory and motor cortex?

    <p>Somatic motor pathways</p> Signup and view all the answers

    What is the primary function of the sympathetic division of the Autonomic Nervous System (ANS)?

    <p>Preparing the body for physical activity</p> Signup and view all the answers

    What is the role of the Autonomic Nervous System (ANS) in controlling involuntary functions?

    <p>Regulating glandular secretions</p> Signup and view all the answers

    What does the sympathetic division of the Autonomic Nervous System (ANS) use to prepare the body for physical activity?

    <p>Norepinephrine</p> Signup and view all the answers

    What do somatic sensory pathways include?

    <p>Spinothalamic, posterior column, and spinocerebellar pathways</p> Signup and view all the answers

    What is the function of the corticospinal and corticobulbar tracts in somatic motor pathways?

    <p>Voluntary motor control</p> Signup and view all the answers

    What is the function of the cerebellum in the nervous system?

    <p>Coordinating motor activities</p> Signup and view all the answers

    Study Notes

    The Spinal Cord and Peripheral Nervous System

    • Functions of the spinal cord include conduction, neural integration, locomotion, and reflexes
    • The spinal cord is divided into cervical, thoracic, lumbar, and sacral regions, with thicker areas in the cervical and lumbosacral enlargements
    • It contains gray matter with sensory and motor horns, and white matter with bundles of axons and various tracts
    • Spinal nerves consist of 31 pairs and form 5 plexuses, with each pair serving specific regions of the body
    • The Autonomic Nervous System (ANS) controls involuntary functions of glands, cardiac muscles, and smooth muscles
    • The ANS is divided into the sympathetic and parasympathetic divisions, with each carrying out specific functions
    • The sympathetic division prepares the body for physical activity, while the parasympathetic division calms body functions
    • The ANS uses different neurotransmitters and receptors to produce opposing effects
    • Cortical pathways include somatic sensory and motor pathways, which involve functional maps of the primary somatosensory and motor cortex
    • Somatic sensory pathways include the spinothalamic, posterior column, and spinocerebellar pathways
    • Somatic motor pathways involve upper and lower motor neurons and include the corticospinal and corticobulbar tracts
    • The cerebellum coordinates motor activities at multiple levels and is involved in preparing for movement and fine-tuning movements

    The Spinal Cord and Peripheral Nervous System

    • Functions of the spinal cord include conduction, neural integration, locomotion, and reflexes
    • The spinal cord is divided into cervical, thoracic, lumbar, and sacral regions, with thicker areas in the cervical and lumbosacral enlargements
    • It contains gray matter with sensory and motor horns, and white matter with bundles of axons and various tracts
    • Spinal nerves consist of 31 pairs and form 5 plexuses, with each pair serving specific regions of the body
    • The Autonomic Nervous System (ANS) controls involuntary functions of glands, cardiac muscles, and smooth muscles
    • The ANS is divided into the sympathetic and parasympathetic divisions, with each carrying out specific functions
    • The sympathetic division prepares the body for physical activity, while the parasympathetic division calms body functions
    • The ANS uses different neurotransmitters and receptors to produce opposing effects
    • Cortical pathways include somatic sensory and motor pathways, which involve functional maps of the primary somatosensory and motor cortex
    • Somatic sensory pathways include the spinothalamic, posterior column, and spinocerebellar pathways
    • Somatic motor pathways involve upper and lower motor neurons and include the corticospinal and corticobulbar tracts
    • The cerebellum coordinates motor activities at multiple levels and is involved in preparing for movement and fine-tuning movements

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    Spinal Cord and Peripheral Nervous System PDF

    Description

    Test your knowledge of the spinal cord, peripheral nervous system, and autonomic nervous system with this quiz. Explore functions, divisions, pathways, and structures involved in controlling movement and involuntary bodily functions.

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