A&P Lab, Final Exam, Exercise 27

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trulyabaker
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A&P Lab, Final Exam, Exercise 27
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2010-12-12 00:43:04
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Lab FinalExam Exercise27
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Questions to know from this module...
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  1. __________________ are routes followed by nerve impulses as they pass through the nervous system.
    Nervepathways
  2. Interneurons in a withdrawl reflex are located in the ____________________.
    • central nervous system (CNS)
    • [spinal cord]
  3. _________________ are automatic subconscious responses to external and internal stimuli.
    Reflexes
  4. Effectors of a reflex are glands and _____________.
    muscles
  5. A patellar reflex employs only ____________ and motor neurons.
    sensory
  6. The effector muscle of the patellar reflex is the _____________________.
    quadriceps femoris
  7. The sensory stretch receptors (muscle spindles) of the patellar reflex are located in the _____________________ muscle.
    quadriceps femoris
  8. The patellar reflex helps the body to maintain ___________________.
    upright posture
  9. The sensory receptors of a withdrawl reflex are located in the ______________.
    skin
  10. ______________ muscles in the limbs are the effectors of a withdrawl reflex.
    flexor
  11. The normal planter reflex results in _____________ of toes.
    flexion
  12. Stroking the sole of the foot in infants results in dorsiflexion and toes that spread apart, called _______________ reflex.
    Babinski
  13. Patellar reflex
    (knee-jerk)

    What is the response observed?
    What is the effector muscle involved?
    extension of leg at knee

    quadriceps femoris
  14. Calcaneal reflex
    (ankle-jerk)

    What is the response observed?
    What is the effector muscle involved?
    planter flexion of the foot

    gastrocnemius and soleus
  15. Biceps reflex

    What is the response observed?
    What is the effector muscle involved?
    flexion of forearm at the elbow joint or slight biceps twitch

    biceps brachii
  16. Triceps reflex

    What is the response observed?
    What is the effector muscle involved?
    extension of forearm at elbow joint or slight triceps twitch

    triceps brachii
  17. Plantar reflex

    What is the response observed?
    What is the effector muscle involved?
    planter flexion of the foot and flexion of toes

    gastrocnemius, soleus, and flexor distorum longus
  18. What are the major events that occur in the patellar (knee-jerk) reflex, from striking of the patellar ligament to the resulting response.
    The quadriceps femoris is stretched...

    Stimulating strectch receptors (muscle spindals) within the muscle...

    As a result, impulses pass along sensory neurons into the spinal cord and synapse with a motor neuron...

    Motor impulses travel out the cord on nerve fibers that lead to the quadriceps femoris...

    Muscle fibers contract, and the leg is extended at the knee joint...
  19. What characteristic do the reflexes (patellar, calcaneal, biceps, triceps, planter) have in common?
    all these reflexes are rapid, subconscious responses to physical stimuli

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