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TYPES OF SKELETAL MUSCLE CONTRACTION (PATTERN OF CONTRACTIONS (TWITCH…
TYPES OF SKELETAL MUSCLE CONTRACTION
ISOMETRIC CONTRACTION
ISOTONIC CONTRACTION
CONCENTRIC CONTRACTION
SHORTEN
TENSION> LOAD
ECCENTRIC CONRACTION
LENGTHEN
PATTERN OF CONTRACTIONS
TWITCH
AP + CONTRACTION + RELAXATION
PERIODS (BELL-SHAPED)
LATENT PERIOD
DEPOLARISATION
CONTRACTION PERIOD
SHORTENING OF MUSCLE FIBER
RELAXATION PERIOD
GO BACK TO RESTING STATE
TWITCH CONTRACTION TIME
FAST TWITCH (< 10 ms)
SLOW TWITCH (> 100 ms)
TETANUS
MAINTAINED CONTRACTION
TYPES
UNFUSED TETANUS
LOW TENSION F
OSCILLATE
FUSED TETANUS
HIGH TENSION
X OSCILLATE
TREPPE
STAIRCASE EFFECT
RAPID TWITCHES INCREASE IN FORCE
FIBRILLATION
AP THAT ARISE SPONTANEOUSLY
SKELETAL MUSCLE ENERGY METABOLISM
PHOPHORYLATION OF ADP BY
CREATINE PHOSPHATE
OXIDATIVE PHOSPHORYLATION OF ADP (
IN MITOCHONDRIA
)
GLYCOLYSIS
TYPES OF SKELETAL MUSCLE FIBER
MAXIMAL SPEED OF SHORTENING/ CONTRACTING
FAST TWITCH FIBER
HIGH ATPase ACTIVITY
TYPE II
SLOW TWITCH FIBER
LOW ATPase ACTIVITY
TYPE I
MAJOR PATHWAY THEY USE TO FORM ATP
OXIDATIVE FIBER
RED MUSCLE FIBER
HIGH MITOCHON
MANY BLOOD VESSELS
GLYCOLYTIC FIBER
WHITE MUSCLE FIBER
LOW MITOCHON
LESS BLOOD VESSEL