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36 Cards in this Set

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moving away from the midline of the body,
abduction
contractile protein found in the thin myofilaments of skeletal muscle
actin
moving toward the midline of the body
adduction
when stimulated, a muscle fiber will contract fully or not at all; wheather a contraction occurs depends on wheter the stimulus reaches the required threshold
all or none
those having opposing actions; for example, muscles that flex the upper arm______.
antagonist muscle
wasting away of tissue; decrease in size of a part
atrophy
when the top of the foot is elevated with the toes pointing upward
dorsiflexion
increasing the angle between two bones at a joint
extension
loss of muscle power; weakness
fatigue
act of bending; decreasing the angle between two bones at the joint
flexion
increased size of a part caused by an increase in the size of its cells
hypertrophy
subnormal core body temperature below 37 degrees Celcius
hypothermia
attachemtn of a muscle to the bone that it moves when contraction occurs
insertion
type of muscle contraction in which muscle does not shorten
isometric
of the same tension or pressure
isotonic
transmits nerve impulses from the brain and spinal cord to muscles and glandular epithelial tissues
motor nueron
a single motor neuron with the muscle cells it innerates
motor unit
ultramicroscopic, threadlike structures found in myofibrils
myofilaments
contractile protein found in the thick filaments of skeletal muscle
myosin
the point of contact between the nerve endings and muscle fibers
neuromuscular juntion
the attachment of a muscle to the bone that does not move when contraction occurs
orgin
continued increased metabolism that occurs in a cell to remove excess lactic acid that resulted from exercise
oxygen debt
loss of the power or motion, especially vouluntary motion.
paralysis
the bottow of the foot is directed downward; this motion allows a person to stand on his or her tiptoes
plantar flexion
position of the body
posture
the muscle responsible for producing a particular movement
prime mover
to turn the palm downward
pronate
movement around a longitudinal axis
rotation
contractile unit of muscle length of a myofibril between two Z bands
sarcomere
agent that causes a change in the activity of a structure
stimulus
to turn the palm of the hand upward
supinate
muscle that assists a prime mover
synergist
bands or cords of fibrous connective tissue that atttach a muscle to a bone or other structure
tendons
inflammation of a tendon sheath
tenosynovitis
sustained contraction
tetanic contraction
special type of skeletal muscle contraction used to maintain posture
tonic contraction