Chap 7 -Muscles
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| Another name for muscle cell? | Muscle Fiber
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| 2 Other names for skeletal muscle? | striated and voluntary
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| 2 Other kinds of skeletal muscle? | Cardiac & smooth
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| - dark bands where plasma membranes of adjacent cardiac fibers come in contact with each other | intercalated disks
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| Which muscle fibers are tapered at each end, have a single nucleus and lack cross stripes or striations of skeletal muscles | Smooth muscle
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| This muscle circulates blood? | Cardiac muscle
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| This type of muscle is responsible for moving food into and through the stomach and intestines. | smooth
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| -muscle attachment to the more stationary bone | Orgin
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| -attachment to the more moveable bone | insertion
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| -attach muscles firmly to bone | tendons
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| -fluid filled sacs that lie btwn some tendons and bones beneath them | bursae
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| form thick myofilaments | myosin
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| form thin myofilaments | actin
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| basic funtional unit of skeletal muscle | sacromere
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| basic building block of skeletal muscle | sacromere
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| 3 functions of the muscular system | movement, posture or muscle tone, heat production
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| -one thats mainly responsible for producting a particular movement | prime mover
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| -enables body to maintain body position bc of low strength continuous muscle contraction/doesn't move body parts | tonic contraction
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| -stimulates muscle fibers | motor neuron
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| -point of contact btwn the nerve ending and the muscle fiber | neuromuscular
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| single motor neuron with the muscle fibers | motor unit
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| min level of stimulation required to cause a fiber to contract | threshold stimulus
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| more sustained and steady response than a twitch | tetanic contraction
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| muscle produces movement at a joint | isotonic contraction
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| insertion end moves toward the point of origin | concentric contraction
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| muscle produces tension as it lengthens and thus the insertion moves away from the origin | eccentric contraction
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| when muscle does not shorten and no movement results internal tension increases | isometric contraction
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| muscles shrinking in mass | disuse atrophy
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| What type of muscles are these: orbicularis oculi orbicularis oris zygomaticus | facial muscles
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| what does orbicularis oculi control? | closes eye
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| What does orbicularis oris control? | kissing muscle
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| What does zygomaticus control? | Smiling muscle
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| What does masseter & temporal muscles control? | closing the jaw
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| What does sternocleidomastoid control? | flexes the head
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| What does trapezius control? | elevates the shoulders and extends the head
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| What muscle group do these muscles belong to? pectoralis major latissimus dorsi deltoid biceps brachii triceps brachii | control the upper extremities
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| Pectoralis major? | flexes upper arm
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| latissimus dorsi? | extends upper arm
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| deltoid | abducts upper arm
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| biceps brachii | flexes forearm
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| triceps brachii | extends forearm
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| rectus abdominis | flexes the trunk ( situps)
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| External and internal oblique and transversus | compresses abdomen
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| Muscle of expiration | intercostal
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| muscles of inspiration? | diaphragm
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| iliopsoas | flexes thigh
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| gluteus maximus | extends thigh
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| adductor muscles | adduct thighs
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| hamstring muscles | flex lower leg
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| quadriceps femoris | extend lower leg
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| tibralis anterior | dorsiflexes the foot
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| gastrocenmius | plantar flexes the foot
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| peroneus group | flexes foot
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