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5 Written questions

5 Matching questions

  1. Sarcoplasm
  2. External lamina
  3. Active tension
  4. Smooth muscle cells
  5. Synaptic vesicles
  1. a Deeper, thinner layer of connective tissue located just outside the sarcolemma
  2. b the force applied to an object to be lifted when a muscle contracts
  3. c cytoplasm without the myofibrils inside sarcolemma
  4. d small sacs that contain Acetylcholine, a neurotransmitter
  5. e Myofilaments attach to dense bodies & dense areas, Sarcoplasmic reticulum not well developed and no transverse tubules, Shallow invaginations, caveolae, occur at intervals along the plasma membrane

5 Multiple choice questions

  1. highly ordered units formed by actin and myosin myofilaments extending from one Z disk to another
  2. During resting conditions stores energy to synthesize ATP; provides enough energy to sustain max contractions for about 8-10 seconds
  3. inside plasma membrane becomes less negative; when the cell is stimulated, gated Na+ channels open and Na+ diffuses into the cell
  4. each axon terminal
  5. Increases in muscle size

5 True/False questions

  1. Repolarizationsecond most common, results from ATP depletion


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


  3. Slow-twitch or high-oxidative (Type I) fibersContract more slowly, smaller in diameter, better blood supply, more mitochondria, myoglobin, more fatigue-resistant than fast-twitch


  4. Skeletal 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


  5. Aerobic 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