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5 Written Questions

5 Matching Questions

  1. Branches of Spinal Nerves: ANTERIOR (ventral) ROOT
  2. Brachial Plexus: ULNAR NERVE
  3. Protective Nerve Coverings: PERINEURIUM
  4. Protective Nerve Coverings: NERVE FIBER
  5. Sensory&Motor Tracts:
  1. a - motor neuron axons which transmit nerve impulses from the spinal cord to the periphery.
    - the cell bodies of the motor neurons are located in the gray matter of spinal cord.
    -cell bodies of motor neurons supplying skeletal muscles are located in anterior gray horns.
    -cell bodies of motor neurons supplying smooth muscle, cardiac muscle, or glands are located in the lateral gray horns.
  2. b - first way spinal cord promotes homeostasis is by conducting nerve impulses along tracts.
    - often, the name of a tract indicates its position.
  3. c - this nerves supplies the anteromedial muscles of the forearm and most of the muscles of the hand.
  4. d - the axon and its associated glial cells form this.
    - is a process projecting from the cell body of a neuron.
  5. e -this is a thicker sheath of connective tissue that packages groups of nerve fibers together into bundles called fasciculi.
    - consists of collagenous sheaths w/ up to 15 layers of fibroblasts distributed in a meshwork of collagen.
    - this sheath functions as a diffusion barrier that maintains the osmotic environment and fluid pressure w/in the endoneurium.

5 Multiple Choice Questions

  1. - each column contains bundles of nerve fibers that may extend up or down the spinal cord called tracts.
    * Sensory (Ascending) Tracts - consist of axons that conduct nerve impulses from the spinal cord toward the brain.
    *Motor (Descending) Tracts - consist of axons that carry nerve impulses away from the brain down the spinal cord.
    -both tracts are continuous w/ sensory and motor tracts of the brain.
  2. - these tracts convey nerve impulses for sensing pain, temperature, itching, tickling, deep pressure, and a crude, poorly localized sense of touch.

    Lateral: sense Pain and Temperature
    Anterior: sense Crude touch and Deep Pressure
  3. - two grooves penetrate the white matter of spinal cord and divide it into right and left sides.
    - this is a wide groove on the anterior(ventral) side.
  4. - axons from the anterior rami of spinal nerves, except for thoracic nerves(T2-T12) do not go directly to the body structures they supply. instead they form networks of axons on both the left and right side of the body joined w/ various numbers of axons from anterior rami of adjacent nerves.
    -the main plexuses are:
    1.) Cervical Plexus
    2.) Brachial Plexus
    3.) Lumbar Plexus
    4.) Sacral Plexus
  5. - consists mostly of the cell bodies of neurons, neuroglia, unmyelinated axons, dendrites of interneurons and motor neurons.
    - nuclei that serve as neural processing centers and origins for certain nerves.
    -the gray commissure connects the two sides of the spinal spord.

5 True/False Questions

  1. Reflexes & Reflex Arcs: REFLEX- this is known to be a fast, involuntary, unplanned sequence of actions that occurs in response to a particular stimulus.

          

  2. Protective Nerve Coverings: EPINEURIUM-this is a thicker sheath of connective tissue that packages groups of nerve fibers together into bundles called fasciculi.
    - consists of collagenous sheaths w/ up to 15 layers of fibroblasts distributed in a meshwork of collagen.
    - this sheath functions as a diffusion barrier that maintains the osmotic environment and fluid pressure w/in the endoneurium.

          

  3. Meninges: ARACHNOID MATER- this is the middle meninx(meninges), and is an avascular covering.
    - is connective tissue that resembles a spider webs arrangement of collagen fibers and some elastic fibers.
    - deep to Dura Mater.
    *Subdural Space - is a space b/w dura mater and arachnoid mater, which contains interstitial fluid.

          

  4. External Anatomy of Spinal Cord: CAUDA EQUINA- these are the roots of spinal nerves emerging from the lower part of the spinal cord.
    - may resemble fine hairs such as "horse's tail"

          

  5. External Anatomy of Spinal Cord: SPINAL CORD- roughly cylindrical, is flattened slightly anteriorly and posteriorly.
    - extends from the medulla oblongata to the sue the superior border of the 2nd lumbar vertebrae.
    -also known as a mass nerve tissue located in the vertebral canal from which 31 pairs of spinal nerves originate.

          

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