Muscles Flashcards
Muscle functions 5
Movement
Stability
Control body openings and passages
Heat production
Glycemic control
Muscle characteristics 5
Excitability
Conductivity
Contractibility
Extensibility
Elasticity
Skeletal muscle shapes
Fusiform
Parallel
Triangular
Pennate (Uni, bi, multi)
Circular
Fusiform muscle
Parallel muscle
Triangular muscle
Pennate muscle
Circular muscle
Origin
The anchored end of the muscle
Insertion
Attached to the moving part of the body
Prime mover
Provides the primary force for the action
Synergist
Aids the prime mover
Fixator
Stabilizes the part of the body that the moving muscle is attached to
Antagonists
Counteracts the prime mover
Facia
Connective tissue that separates the muscle from other muscles and organs
Epimysium
Connective tissue that surrounds an individual muscle
Perimysium
Connective tissue that surrounds and defines fascicles
Endomysium
Connective tissue that separates individual muscle fibers
Muscle structure
Muscle
Fascicle
Muscle fiber
Sarcolemma
Cell membrane
- T tubules
T tubules
Infoldings from the sarcolemma that penetrate and conduct impulses from one side of the cell to the other
Sarcoplasm
Cytoplasm
- glycogen
- myoglobin
- sarcoplasmic reticulum
- myofibrils
Glycogen
Polysaccharide
Is converted into glucose to produce ATP
Myoglobin
Protein that binds to oxygen making it available to cells