muscle anatomy
describes the ability of muscle cells to respond to a stimulus
Excitability
a cordlike structure that anchors muscle to bone
Tendon
describes a single motor neuron and all muscle fibers to which it attaches
Motor unit
muscle fibers are arranged with a central tendon and muscle fibers emerging diagonally, giving them a featherlike appearance
Pennate
describes contraction that cause a muscle to shorten in length while generating force
Concentric
the covering of a muscle cell
Sarcolemma
a broad, flat tendon
Aponeurosis
the universal unit of energy in the cell
Adenosine triphosphate
the tendinous attachment on bone that is more stable and less movable during contraction
Origin
defined as a lengthening contraction
Eccentric
the basic unit of contraction
Sarcomere
strip-like retaining bands of connective tissues that help stabilize tendons and keep them in place
Retinacula
the model of muscle contraction
Sliding filament mechanism
the tendinous attachment on the bone and is more movable during contraction
Insertion
describes muscle contraction that generate force while muscle length remains the same and movement does not occur
Isometric
a thin filament protein
Actin
the name of fascia that covers the individual muscle fibers
Endomysium
muscle fibers fatigue easily and are referred to as type 2 muscle fibers, or white muscle
Fast twitch
muscles that cause specific or desired movements, and are also referred to as main movers
Agonists
activated when muscles are stretched rapidly and responds by contracting the muscle reflexively
Muscle spindle
the thick filament
Myosin
the principal neurotransmitter involved in muscle contraction
Acetylcholine
muscles have fibers joining at one end with fibers spreading out like a fan at the other end
Convergent
muscles that facilitate movements caused by prime movers by performing the same movements at the same time
Synergists
detects tension or pull and is activated when tension exceeds a certain threshold that then triggers a lengthening reaction
Golgi tendon organ