HIST 1003 Chapter : French Revolution 2 1 Lily
Document Summary
Functions of muscular tissue: body movements, body stability, storing and moving substances, producing heat. Properties of muscular tissue: electrical excitability- shared with neurons; propagation of a signal, contractility-contract forcefully in response to stimuli, extensibility- ability to stretch, elasticity- ability to go back to original shape after being stretched. Muscle cell organization: epimysium- outer most layer; surrounds entire muscle, fascicle- surrounded by perimysium, endomysium- Microscopic anatomy of a skeletal muscle fiber: muscle fibers- measured in inches, hypertrophy- increased cell size; cell growth, hyperplasia- increased cell number, atrophy- decreased cell size; nonuse. Muscle tone: even while at rest, a skeletal muscle exhibits muscle tone, isotonic contraction- tension devevlops by muscle that remains almost constant while the muscle changes in length, isometric contraction- muscle length remains the same. Types of skeletal muscle fibers: skeletal muscle fibers vary in their content of myoglobin (an o2- binding protein, categorized by how fast they can metabolize, slow oxidative, fast oxidative-glycolytic, fast glycolytic.
