muscle fiber
Striated tissue unit
A muscle fiber is a single elongated cell that makes up muscle tissue.
These cells contract when stimulated, producing movement and force.
Skeletal muscle fibers are the largest cells in the human body, running the full length of a muscle.
Athletes speak of muscle fibers in terms of type—slow-twitch fibers for endurance, fast-twitch for explosive power: Sprinters have more fast-twitch muscle fibers.
Motor protein enabling contraction
- actinCellular contractile protein
- fascicleSection of a book
- striationParallel linear marking
- mitochondriaCell's energy-producing organelles
Combustion-driven piston movement
- troponinMuscle regulatory protein complex
- twitchInvoluntary muscular jerk
- tetanusMuscle-stiffening bacterial disease
- relaxationState of being unwound
shortening · lengthening · isometric · isotonic · eccentric · concentric · fatigue · refractory period
Tissue enlargement via cells
- atrophyWasting from disuse
- adaptationFitting to new conditions
- overloadBurden beyond capacity
- resistance trainingExercise against opposing force
protein synthesis · repair · recovery · growth · gains · conditioning · strengthening · microtrauma
Involving electron removal
- intermediateBetween two levels
- explosiveProne to sudden detonation
- enduranceSustained effort capacity
- aerobicRequiring free oxygen
Degenerative tissue disorder
- myopathyDisorder of muscle tissue
- atrophyWasting from disuse
- necrosisLocalized cell death
- inflammationProtective tissue response
denervation · regeneration · degeneration · biopsy · myositis
myosin
Motor protein enabling contraction
power stroke
Combustion-driven piston movement
- troponinMuscle regulatory protein complex
- twitchInvoluntary muscular jerk
- tetanusMuscle-stiffening bacterial disease
relaxation · shortening · lengthening · isometric · isotonic · eccentric · concentric · fatigue · refractory period
hypertrophy
Tissue enlargement via cells
- atrophyWasting from disuse
- adaptationFitting to new conditions
- overloadBurden beyond capacity
resistance training · protein synthesis · repair · recovery · growth · gains · conditioning · strengthening · microtrauma · supercompensation
oxidative
Involving electron removal
- intermediateBetween two levels
- explosiveProne to sudden detonation
- enduranceSustained effort capacity
dystrophy
Degenerative tissue disorder
inflammation · denervation · regeneration · degeneration · biopsy · myositis
- biostructurescell membrane, cell wall, cytoskeleton, mitochondria, nucleus
- body partsarm, leg, hand, back, chest
- muscle systembiceps, triceps, deltoid, deltoids, quadriceps
- tissuesadipose, neural tissue, cardiac tissue, bone, connective
- kinesiologybones, joints, tendons, flexion, ligaments
- body cellsred blood cells, white blood cells, erythrocytes, fat cell, leukocytes
muscle fiberbone
Hard skeletal tissue
nerve fiber · tendon · connective tissue · osteocyte · cartilage
muscle, fiber, muscular, muscles, fibrous, muscled, muscly, musculature, fibril