Classification Of Nerve Fibers

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| By Melparks
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Melparks
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Quizzes Created: 6 | Total Attempts: 6,532
Questions: 7 | Attempts: 690

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Questions and Answers
  • 1. 

    Conducts inpulses from voluntary structures to the CNS - sensory-going out

    • A.

      General Somatic Afferent Fiber

    • B.

      General Somatic Efferent Fibers

    • C.

      General Visceral Afferent Fibers

    Correct Answer
    A. General Somatic Afferent Fiber
    Explanation
    General Somatic Afferent Fibers conduct impulses from voluntary structures to the central nervous system (CNS). These fibers are responsible for transmitting sensory information from the skin, skeletal muscles, and joints to the CNS. They allow us to perceive sensations such as touch, pain, temperature, and proprioception.

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  • 2. 

    Conducts impulses from CNS to the voluntary structures

    • A.

      General Somatic Afferent Fiber

    • B.

      General Somatic Efferent Fibers

    • C.

      General Visceral Afferent Fibers

    Correct Answer
    B. General Somatic Efferent Fibers
    Explanation
    General Somatic Efferent Fibers conduct impulses from the central nervous system (CNS) to the voluntary structures. These fibers are responsible for carrying motor commands from the CNS to the skeletal muscles, allowing voluntary movement and control. They transmit signals that initiate muscle contraction and movement in response to conscious decisions made by the brain.

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  • 3. 

    Conducts impulses from involuntary structures to the CNS- sensory

    • A.

      General Somatic Afferent Fiber

    • B.

      General Somatic Efferent Fibers

    • C.

      General Visceral Afferent Fibers

    Correct Answer
    C. General Visceral Afferent Fibers
    Explanation
    General Visceral Afferent Fibers conduct impulses from involuntary structures to the central nervous system (CNS). These fibers are responsible for transmitting sensory information from internal organs, such as the heart, lungs, and digestive system, to the CNS. This allows the body to monitor and regulate the functioning of these organs.

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  • 4. 

    Conducts impulses from CNS to the involuntary structures

    • A.

      General Visceral Efferent Fibers

    • B.

      General Visceral Afferent Fibers

    • C.

      General Somatic Efferent Fibers

    Correct Answer
    A. General Visceral Efferent Fibers
    Explanation
    General Visceral Efferent Fibers conduct impulses from the central nervous system (CNS) to the involuntary structures of the body. These fibers are responsible for transmitting motor signals to smooth muscles, cardiac muscles, and glands, controlling their involuntary functions such as digestion, heart rate, and secretion. Unlike General Somatic Efferent Fibers, which control voluntary movements of skeletal muscles, and General Visceral Afferent Fibers, which transmit sensory information from the internal organs to the CNS, General Visceral Efferent Fibers specifically regulate the autonomic functions of the body.

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  • 5. 

    Myelinated fiber with larger diameter; average impulse speed is 130 meters per second - sharp pain

    • A.

      A Fiber

    • B.

      B Fiber

    • C.

      C Fiber

    Correct Answer
    A. A Fiber
    Explanation
    The correct answer is A Fiber because myelinated fibers with larger diameters have faster conduction speeds. Since the average impulse speed is 130 meters per second, it indicates that the fiber is myelinated and has a larger diameter. This type of fiber is responsible for transmitting sharp pain signals quickly.

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  • 6. 

    Myelinated fibr with moderate diameter; average impulse speed is 10 meters per second

    • A.

      A Fiber

    • B.

      B Fiber

    • C.

      C Fiber

    Correct Answer
    B. B Fiber
    Explanation
    The correct answer is B Fiber because myelinated fibers with moderate diameter typically have an average impulse speed of 10 meters per second.

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  • 7. 

    Unmyelinated fiber with smaller diameter; average impulse speed is 0.5 meters per second - i.e. dull pain

    • A.

      A Fiber

    • B.

      B Fiber

    • C.

      C Fiber

    Correct Answer
    C. C Fiber
    Explanation
    C fibers are unmyelinated fibers with smaller diameter, which leads to a slower average impulse speed of 0.5 meters per second. This slower conduction velocity is associated with dull pain sensations. C fibers are responsible for transmitting slow, chronic, and throbbing pain signals, as opposed to the faster A fibers that transmit sharp, acute pain signals. Therefore, the given answer correctly identifies C fibers as the type of fiber associated with dull pain.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 20, 2011
    Quiz Created by
    Melparks
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