Ch 7 Flashcards
degeneration of a muscle, decrease in cells, associated with age
Atrophy
opposite action
Antagonist
layers of tissue in muscle, stripes, visible bands
Striations
more moveable attachment point of muscle
Intersection
muscles between ribs
Intercostals
organ muscle
Smooth
pivot point of lever system
Fulcrum
flattens cheeks eating, whistling
Buccinators
a protein that makes the thick filament
Myosin
a muscle that decreases the angle at a joint
Flexor
a type of neurotransmitter released at NMJ
acetylcholine
inhale and exhale, contracts thorax
diaphragm
achillies
heel
energy, causes myosin head to detach from actin
ATP
raises shoulder and pulls it back, turns head
trapezius
oxygen shortage by exercises (muscles act aerobically, they are stable)
Oxygen debt
raises heel, flexes the knee, plantar flexes the ankle
Gastrocnemius
glucose, stored in muscle, used for energy
Glycogen
produces movement, main muscle
Prime mover
tension/ tone is the same, length changes
Isotonic
muscle tension changes, length stays the same
Isometric
connective tissue surrounding muscles
Epimysium
the deepest layer of connective tissue surrounding individual fibers
Endomysium
connective tissue surrounding each fascicle
Perimysium
The action of a motor neuron and motor unit
a single neuron and its muscle fibers make up the motor unit
the function of actin and myosin
forms cross bridges, contraction
the substance of oxygen debt
lactic acid
compound that stores oxygen in muscle cells
myoglobin
around mouth and eye
orbicularis
decreases angle between bones and joints
flexor
raises body part
levator
rotates the head away from the muscle
Sternocleidomastoid
closes jaw, chewing
masseter
closes mouth
orbicularis orbis
flexes leg
hamstring
brachi/o
arm
smooth muscle
organs
skeletal muscles
bones
cardiac muscles
heart
