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5 Written questions

5 Matching questions

  1. Complete tetanus
  2. Atrophy
  3. ATP
  4. Smooth muscle
  5. Sub-threshold stimulus
  1. a No relaxation between contraction
  2. b Decreases in muscle size
  3. c provides immediate energy for muscle contractions from 3 sources; creatine phosphate, anaerobic respiration, and aerobic respiration
  4. d Walls 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
  5. e not strong enough to cause an action potential in any of the axons in a nerve and causes no contraction

5 Multiple choice questions

  1. Not striated, single nucleus, fewer actin and myosin organized as loose bundles. Dense bodies in cytoplasm and dense areas in plasma membrane, instead of Z disks as in skeletal muscle, have noncontractile intermediate filaments, sarcoplasmic reticulum without transverse tubules, Ca2+ required to initiate contractions and bind to calmodulin
  2. General term for the connective tissue sheets within the body
  3. highly ordered units formed by actin and myosin myofilaments extending from one Z disk to another
  4. Return of resting membrane potential; voltage-gated Na+ channels close and voltage-gated K+ channels open and K+ moves out of the cell making it more negative
  5. least common, occurs in neuromuscular junction, due to lack of acetylcholine

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. Myosinthin myofilaments composed to two strands of fibrous actin (F actin made of G actin units), tropomyosin molecules, and troponin molecules

          

  3. Motor unitssingle motor neuron and all the muscle fibers innervated

          

  4. Muscle contractionsresponse to a stimulus that causes action potential in one or more muscle fibers; lag or latent phase, contraction phase, and relaxation phase. Graded response for whole muscles, strength of contractions range from weak to strong depending on stimulus strength

          

  5. Muscular fasciasecond most common, results from ATP depletion

          

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