Test 7 Flashcards
Other names for smooth muscle
Nonstriated muscle
Involuntary muscle
Characteristics of cardiac muscle
Has dark bonds called intercalated disks
Muscle fiber interconnects allowing heart ot contract efficiently as a unit
Muscle movement
Chemical energy is converted into mechanic energy
Prime mover
Mainly responsible for producing a given movement
Synergist
Helps prime mover produce movement
Antagonist
Apposes the action of a prime mover in a given movement
Muscle tone
A continuous, low strength muscle contraction called tonic contraction
Hypertrophy
Regular exercise increases muscle size
Atrophy
Muscle shrink in mass
Strength training effects
Increases number of myofilamenta in each muscle fiber
Is aerobic
What causes fatigue?
Repeated muscle stimulation without adequate period of rest
Motor unit
Combination of a motor neuron with all the muscle fibers to connect
Threshold stimulus
Minimal level of stimulation required to cause muscle fiber contraction
Isotonic contractions
Produce movement at a joint
Isometric contractions
Contractions that do not produce movement
