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5 Written questions

5 Matching questions

  1. Muscular fatigue
  2. Ligand-gated ion channels
  3. Creatine phosphate
  4. Epimysium
  5. Smooth muscle
  1. a During resting conditions stores energy to synthesize ATP; provides enough energy to sustain max contractions for about 8-10 seconds
  2. b second most common, results from ATP depletion
  3. c Third layer of connective tissue of dense collagenous connective tissue that covers the entire surface of the grouped together fasciculus (muscle)
  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 Open in response to ligand molecules binding to receptor proteins or glycoproteins. Ex: neurotransmitters

5 Multiple choice questions

  1. Graded response in a muscle. Occurs in muscle that has rested for prolonged period. Each subsequent contraction is stronger than previous until all equal after few stimuli
  2. each axon terminal
  3. single motor neuron and all the muscle fibers innervated
  4. contractility-shorten forcefully, excitability-response to stimuli, extensibility-stretched beyong normal resting length, elasticity-can recoil to its original resting length after being stretched
  5. not strong enough to cause an action potential in any of the axons in a nerve and causes no contraction

5 True/False questions

  1. Resting membrane potentialAs frequency of action potentials increase, frequency of contraction increases, and therefore muscle tension increases.

          

  2. Aerobic respirationRequires oxygen and breaks down glucose to produce ATP, carbon dioxide and water. More efficient than anaerobic; produces up to 38 molecules of ATP for each glucose

          

  3. Voltage-gated ion channelsNo relaxation between contraction

          

  4. Fatigue in musclesdecreased capacity to do work and reduced efficiency of performance

          

  5. Effects of aging on skeletal muscleAttached to bones
    About 40% of the body weight
    Nuclei multiple and peripherally located
    Striated, Voluntary and involuntary (reflexes)