For the following answer true or false please 79) The power stroke is generated

Question

For the following answer true or false please 79) The power stroke is generated during the latent phase 80) Reformation of cross bridges occurs during the contraction-relaxation phase 81) Creatine phosphate (phosphocreatine) carries extra oxygen in slow oxidative fibers 82) Myosin gives fast oxidative fibers their characteristic color 84) Fast oxidative fibers may develop more endurance with proper training and conditioning. 85) Creatine phospho-kinase attaches a phosphate group to creatinine 86) A motor unit with one neuron per 10 muscle fibers will generate more precise movements than one with one neuron per 100 muscle fibers 87) Muscle cells replicate via mitosis after a good righteous workout. 88) Synergistic muscles work with each other 89) Muscle tissue, like your lab instructor's evil twin before his morning coffee, is irritable 90) An Olympic class weightlifter would have mostly slow oxidative muscle fibers. 91) Myoglobin is an oxygen carrying protein 92) Troponin prevents overstretching of myofibrils 93) Reactive hyperemia results from oxygen starvation caused by an occluded blood vessel. 94) Active hyperemia results from exercise or other increased metabolic demand. 95) The parasympathetic nervous system speeds up the SA node.

Explanation / Answer

Ans 79. False (power stroke is generated during the contraction phase)

Ans 80. False (reformation of cross bridges occur during contraction phase only)

Ans 81. False (creatine phosphate supply extra energy)

Ans 82. False ( it is the lack of myoglobin that gives fast oxidative fibres their characteristic pale colour, designating them as white fibres)

Ans 84. True

Ans 85.True

Ans 87. False ( muscle cells donot replicate . they only grow in size)

Ans 88. True

Ans 90. False (have mostly fast glycolytic fibres)

Ans 91. True

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