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5 Written Questions

5 Matching Questions

  1. Cardiac muscle
  2. Smooth muscle regulation
  3. Active tension
  4. All-or-none law for muscle fibers
  5. Multiple-Wave summation
  1. a Innervated by autonomic nervous system, neurotransmitters are acetylcholine and norepinephrine, hormones important are epinephrine, and oxytocin, receptors present on plasma membrane determines which neurotransmitters or hormones bind and determines response
  2. b the force applied to an object to be lifted when a muscle contracts
  3. c Heart
    Single nucleus centrally located
    Striated, involuntary, intercalated disks with gap junctions
  4. d As frequency of action potentials increase, frequency of contraction increases, and therefore muscle tension increases.
  5. e Contraction of equal force in response to each action potential

5 Multiple Choice Questions

  1. Controls muscle contractions through action potentials
  2. Muscle fiber (cell) plasma membrane
  3. Decreases in muscle size
  4. large protein molecule that holds the thick myofilaments in place
  5. Reduced muscle mass, increased time for muscle to contract in response to nervous stimuli, Reduced stamina, increased recovery time, loss of muscle fibers, decreased density of capillaries in muscle

5 True/False Questions

  1. PerimysiumHeavier connective tissue surrounding muscle fibers with their endomysium.

          

  2. Slow-twitch or high-oxidative (Type I) fibersstrong enough to produce an action potential in a single motor unit axon, causing all the muscle fibers of that motor unit to contract

          

  3. Skeletal muscle structureMuscle fibers or cells- Develop from myoblasts, numbers remain constant, just increase in size
    Connective tissue surrounds muscle and extends beyond to become tendons to connect it to bones or dermis of skin
    Nerve and blood vessels abundant

          

  4. Isometric contractionsChange in length but tension constant. Can be concentric, overcomes opposing resistance and muscle shortens or eccentric, tension maintained but muscle lengthens

          

  5. Postsynaptic membrane or motor end-platemuscle plasma membrane in the area of the junction

          

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