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anatomy448
anatomy flash cards
Question | Answer |
---|---|
ability for the muscle to shorten with force | contractility |
capacity of skeletal muscle to respond to stimuli | excitability |
ability to be stretched | extensibility |
ability to snap back into place after being stetched | elasticity |
near the center of the cell | synapse |
single motor neuron | motor unit |
muscles regulate what ? | body temperature |
each skeletal muscle is surrounded by connective tissue called ? | epimysium |
what is another connective tissue surrounding the epimysium? | Fascia |
what is numerous bundles? | muscle fasiculi |
fascicles are surrounded by what loose connective tissue ? | perimysium |
another name for muscles | fibers |
each fiber is surrounded by a muscle tissue sheath called a ? | endomysium |
a threadlike structure that extends from one fiber to another | myofibrils |
2 kinds of protein fibers | actin, myosin |
thin myofilaments | actin myofiliments |
thick myofiliments | myosin |
highly ordered unis are ? | sarcomeres |
what disk does the sarcomere extend from ? | z line (disk) |
What has actin in it ? | I band |
what has myosin in it? | A band |
light area inside the center of a sarcomere | H zone |
charge difference across the membrane | resting membrane potential |
brief reversal back charge | action potential |
nerve cells that carry on potentials | motor neurons |
each branch connected form a | neromuscular junction (synapse) |
enlarged nerve terminal | presynaptic terminal |
the space in between a presynaptic terminal | synaptic cleft |
each presynaptic terminal contains | synaptic vesicles |
nuerotransmitter | acetylcholine |