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5 Written questions

5 Matching questions

  1. Multiple-Wave summation
  2. Complete tetanus
  3. Cardiac muscle
  4. Connective tissue
  5. ATP
  1. a provides immediate energy for muscle contractions from 3 sources; creatine phosphate, anaerobic respiration, and aerobic respiration
  2. b External lamina
    Endomysium
    Perimysium
    Fasciculus
    Epimysium
  3. c No relaxation between contraction
  4. d As frequency of action potentials increase, frequency of contraction increases, and therefore muscle tension increases.
  5. e Heart
    Single nucleus centrally located
    Striated, involuntary, intercalated disks with gap junctions

5 Multiple choice questions

  1. the structural and functional unit of skeletal muscle that extends from one Z-disk to another
  2. Tends to contract in response to sudden stretch but not to slow increase in length, exhibit relatively constant tension or smooth muscle tone, amplitude of contraction remains constant although muscle length varies, does not respond in a all or nothing fashion to action potentials, contracts without major change in the membrane potential
  3. Membrane voltage difference across membranes (polarized)
    Inside cell more negative and more K+
    Outside cell more positive and more Na+
    Must exist for action potential to occur
  4. Open in response to ligand molecules binding to receptor proteins or glycoproteins. Ex: neurotransmitters
  5. produces action potentials in axons of additional motor units

5 True/False questions

  1. Cardiac muscleWalls of hollow organs, blood vessels, eye, glands, skin
    Most widely distributed type of muscle in the body
    Single nucleus centrally located
    Not striated, involuntary, gap junctions in visceral smooth

          

  2. Rigor mortissingle motor neuron and all the muscle fibers innervated

          

  3. Action potential phasesExternal lamina
    Endomysium
    Perimysium
    Fasciculus
    Epimysium

          

  4. FasciculusBundle of muscle fibers ensheathed by perimysium

          

  5. Anaerobic respirationOccurs in absence of oxygen and results in breakdown of glucose to yield ATP and lactic acid; net gain of 2 ATP from glycolysis; supports intense muscle contraction for up to 3 minutes