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Chapter 6 Muscles
| Question | Answer |
|---|---|
| raises the eyebrows | occipitofrontal |
| the ability to shorten with force | contractility |
| smiling muscle | zygomaticus |
| thin myofilaments that resemble 2 minute strands of pearls twisted together | actin myofilament |
| thick myofilament that resemble bundles of minute golf clubs | myosin myofilament |
| joined end to end to form the myofibril | sarcomeres |
| puckers the lips | orbicularis oris |
| muscles that move the thorax | thoracic muscles |
| buttocks | gluteus maximus |
| the ability to be stretched | extensibility |
| is the most stationary end of the muscle | origin |
| the portion of the muscle between the origin and the insertion | belly |
| elevate the ribs during inspiration | external intercostal |
| contract during forced expiration | internal intercostal |
| depressor anguli oris | frowning |
| levator labii superioris | sneering |
| chewing | mastication |
| changes the shape of the tongue | intrinsic tongue muscle |
| move the tongue | extrinsic tongue muscle |
| rotates the scapula | trapezius |
| pulls scapula anteriorly | serratus anterior |
| extends the fingers | extensor digitorum |
| flexes the fingers | flexor digitorum |
| flexes the thigh | sartorius |
| the muscle remains contracted without relaxing | tetany |
| is produced in the mitochondria | ATP |
| the end of muscles undergoing the greatest movement | insertion |
| muscles that work together to accomplish specific movements | synergists |
| muscles that work in oppositions to one another | antagonists |
| the capacity of skeletal muscles to respond to a stimulus | excitability |
| ability to recoil to their original resting length after they have been stretched | elasticity |
| is another connective tissue located outside the epimysium | fascia |
| each fiber is surrounded by a connective tissue sheath | endomysium |
| closes the eyelids | orbicularis oculi |
| flattens the cheek | buccinator |
| mastication | chewing |
| changes the shape of the tongue | intrinsic tongue muscles |
| moves the tongue | extrinsic tongue muscles |
| flexes the wrist | flexor carpi |
| extends the wrist | extensor carpi |
| flexes the fingers | flexor digitorum |
| extends the fingers | extensor digitorum |
| extends the leg and is anterior thigh muscles | quadriceps femoris |
| flexes the thigh | sartorius |
| flexes the leg and extends the thigh | hamstring muscle |
| elevate the ribs during inspiration | external intercostals |
| contract during forced expiration | internal intercostals |
| on each side of the linea alba is the | rectus abdominus |
| the time of contraction | contraction phase |
| lateral neck muscle and the prime mover | sternocleidomastoid |
| hip muscle and common injection cite | gluteus Medius |
| 19 hand muscles are called | intrinsic hand muscles |
| located between the metacarpals, are responsible for abduction and adduction in the fingers | interossi muscles |
| buttocks | gluteus maximums |
| flex the foot and toes | Achilles tendon |
| from the calf muscles and they join to form the calcaneal tendon | gastrocnemius and soleus |
| the cytoplasm of each fibers is filled with | myofibrils |
| the fasciculi are composed of single muscle cells called | fibers |
| each sarcomere extends from | one Z line to another Z line |
| are nerve cells that carry action potentials to skeletal muscles fibers | motor neurons |
| it diffuses across the synaptic cleft and binds to the postsynaptic terminal causing a change in the | postsynaptic cell |
| each presynaptic terminal is the | presynaptic terminal |
| the space between the presynaptic terminal and the muscle is called | synaptic cleft |
| each presynaptic terminal contains | synaptic vesicles |
| occurs as actin and myosin myofilaments slide past one another causing the sarcomeres to | shorten |
| when the sarcomeres shorten it causes | the muscle to shorten |
| this phenomenon is called | all or none response |
| the time between application of a stimulus to a motor neuron and the beginning of a contraction is the | lag phase |
| is the amount of oxygen needed in chemical reactions to convert lactic acid to glucose and to replenish the depleted stores of creatine phosphate stores in muscles cells | oxygen debt |
| contracts quickly and fatigue quickly | fast twitch fibers |
| what is dark meat of a ducks breast or the legs of a chicken | slow twitch fibers |
| white meat of a chicken breast is an example of | fast twitch fibers |
| muscles that work in opposition to another are called | antagonists |
| most muscles have names that are | descriptive |
| group of muscles on each side of the backs | erector spinae |
Created by:
ajross3
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