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Anatomy & Physiology Lecture Exam Set 1

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Terms in this set (18)

  • What connects bones in a syndesmosis fibrous joint?
    Ligaments connect bones in a syndesmosis fibrous joint.
  • What lubricates synovial joints to reduce friction?
    Synovial fluid lubricates synovial joints and reduces friction.
  • Which muscle type produces more tension due to more muscle fibers?
    Pennate muscles typically produce more tension because they have more muscle fibers.
  • Which muscles are stretched and relaxed when the prime mover is active?
    Antagonists are stretched and relaxed when the prime mover (agonist) is active.
  • What causes the striated appearance of cardiac muscle?
    The striated appearance is primarily due to the arrangement of contractile proteins.
  • Which activity is sustained by Type I (slow-twitch oxidative) muscle fibers?
    Long-distance running is sustained by Type I slow-twitch oxidative fibers.
  • During muscle contraction, what happens to the Z-discs in the sarcomere?
    The Z-discs move closer together as the sarcomere shortens during contraction.
  • What happens if a sarcomere exceeds its ideal length?
    Less tension is produced if the sarcomere is stretched beyond its ideal length.
  • Which connective tissue surrounds an entire nerve and contains fascicles?
    Epineurium surrounds an entire nerve and contains numerous fascicles.
  • What is a shift in membrane potential toward a more positive value called?
    Depolarization is a shift in membrane potential toward a more positive value.
  • What happens when an EPSP reaches threshold in a postsynaptic neuron?
    An action potential will be generated when EPSP reaches threshold.
  • At rest, how is the inside of a neuron charged compared to the outside?
    The inside of a resting neuron is more negative than the outside.
  • How are dermatomes useful in diagnosing nerve injuries?
    Dermatomes are innervated by sensory fibers of a particular nerve, helping localize nerve injuries.
  • What is the integration center for reflex arcs where afferent neurons synapse?
    The spinal cord acts as the integration center for reflex arcs.
  • Which nervous system activity explains increased salivation and hunger from smelling food?
    The parasympathetic nervous system controls salivation and hunger responses.
  • What effect might excessive dosage of a pill blocking glycine receptors cause?
    It may cause muscle spasms due to loss of inhibitory neurotransmission.
  • What happens to the sympathetic nervous system activity after exercise?
    The sympathetic nervous system activity increases after exercise.
  • Where are postganglionic sympathetic fibers found in the ANS?
    They are found in the gray rami communicantes.