KINESIOL 3U03 Study Guide - Final Guide: Glycolysis, Dual-Energy X-Ray Absorptiometry, Rectus Abdominis Muscle
17 Sep 2016
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Muscle cardiac muscle smooth muscle (involuntary) skeletal muscle: difficult to study children (invasive) 5. separated by extracellular material; a lot of extracellular fluid surrounding the fibers at birth (term) 7. increased number (more within the same space as fetal: more closely packed; less extracellular material between muscle fibers at birth adult. Muscle structure/function sarcomere: unit of function; a building block fibers grow: become longer by adding sarcomere units. 2 muscle growth occurs at muscle-tendon junction, muscle grows at both ends. Muscle fiber types slow twitch: type i 1 oxidative. Fast twitch: type iia oxidative/glycolytic, type iib - 1 glycolytic. 1 y/o we have more type i and relative fiber distribution is similar to adulthood. From adolescent to adulthood: females: type 1 , type ii , males: Muscle fibre diameter increases prenatally: all fibre types have similar diameter. Postnatal growth: increased diameter = hypertrophy (not hyperplasia, as we mature, fiber size will be different.
