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BIOL 473: Final Exercise physiology UPDATED ACTUAL Exam Questions and CORRECT Answers

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biol 473 final exercise physiology

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BIOL 473: Final Exercise physiology
UPDATED ACTUAL Exam Questions and
CORRECT Answers
what kind of muscle exhibits remarkable plasticity in structure and function? - CORRECT
ANSWER - skeletal muscle

what does it mean that adult muscle fibers are postmitotic? - CORRECT ANSWER - no
cell division after maturation

how does structural plasticity manifest itself? - CORRECT ANSWER - as changes in fiber
size
-atrophy to hypertrophy

what is functional plasticity? - CORRECT ANSWER - intercoversion of muscle fibers
-between Type 1 and Type II
-or modulation of mitochondrial density

Type 1 - CORRECT ANSWER - slow twitch

type II - CORRECT ANSWER - fast twitch

how are type I cells fatigue-resistant ? - CORRECT ANSWER - high mitochondrial
density

why are type I muscle fibers energy-efficient? - CORRECT ANSWER - rely on aerobic
respiration of ATP

what do Type II fibers exhibit? - CORRECT ANSWER - rapid cross-bridge cycling

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