Stack #184377 test 4
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| Two Characteristics of skeletal muscle | function largely under voluntary controlproduces body heat
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| Endomysseium surrounds | a muscle fiber
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| Fascia | separates muscles
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| The region of the sarcomere which has actin and no myosin is known as the | I band
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| Troponin has | Three subunits, high affinity for calcium ions, high affinity for tropomyosin, and a high affinity for actin
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| The Z-disc is located in the middle of the | I-band
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| The sarcoplasmic reticulum | stores calcium ions
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| An action potential is produced when Na ions enter the sarcolemma causing | depolarization
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| Curare, a toxin, binds to the acetylcholine receptors at the motor end plate. This would result in | inability of the muscle to respond to stimuli from the nerve (i.e. paralysis)
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| An eneergy storage medium in muscle is | creatine phosphate
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| An aerobic resperation | yields two ATP per molecule of glucose metabolized
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| In an isotonic contraction, the muscle | changes in lingth and moves the load
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| The site of calcium regulation in smooth muscle is | calmodulin
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| 4 aerobic respiration characteristics are | occurs in smaller red muscle fibers (slow-twitch fibers)yields as much as 36 ATP per glucose molecule metabolizedOccurs only if sufficient amounts of oxygen are presentforms ATP in the resting muscle
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| Recovery from oxygen debt includes | an elevated aerobic metabolismreserves of creatine phosphate replenishedlactic acid converted to glucosean increase in heart rate and rate of breathing
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| glycolytic (fast acting) muscle fibers | fatigue easier
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| Intense exercise that results in a great deal of anaerobic activity | increases muscle mass
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| Muscle hypertrophy results from increased | size of individual muscle fibers
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| Atrophy | results when a limb is immobilized for a long period of time such as in a cast
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| A muscle sphincter | orbicularis oris
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| Flexing the forearn by the biceps brachii represents a | class III lever system
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| Some muscles that are named for their size | vastus medialis, adductor longusgluteus maximusadductor brevis
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| right sternocleidomastoid muscle would | pull the head towards the right
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| The "boxer's muscle" | serratus anterior
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| The muscles responsible for closing the mouth | masseter and temporalis
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| Damage to the coccygeus would result in | a decreased support for the pelvic viscera
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| coraco brachaialis | is not part of the rotator cuff
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| Extension of the forearm is accomplished by the | triceps brachii
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| a powerful muscle that flexes the wrist is the | flexor carpi radialis
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| Three muscles most commonly used for injection sights | deltoid, gluteus medius, vastus lateralis
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| What muscles make up the quadriceps femoris group | rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
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| The hamstring muscle group is composed of the | biceps femoris, flexor digitorum longus,simimembranosussemitendinosus
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| What muscles are connected to the calcaneus via the calcaneal (Achilles) tendon | gastrocnemius, soleus
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| The structural and functional unit of the skeletal muscle | darcomere
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| the cytoplasm of muscle cells | sarcoplasm
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| found in cardiac muscle | intercalated discs
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| the cell membrane of a muscle fiber | sarcolemma
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| Releases calsium when an action potential is produced on the muscle cell's plasma membrane | sarcoplasmic reticulum
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| The end of the muscle that is attached to the more stationary of the two bones that it connects is called the | origin
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| In muscle action the skeletal muscle meurotransmitter released into synaptic cleft is | acetylcholine
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| a broad muscle of the back which insert on the intertubercular groove of the humerus is the | latissima dorsi
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| a muscle working in opposition to another muscle is a/an | antagonist
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| the muscle that plays the major role in accomplishing the desired movement | prime mover
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| a muscle which is the prime mover of arm extension is the | larissimus dorsi
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| what muscle has its origin on the lateral condyle and upper 2/3 of the tibia and ists insertion on the first metatarsal and first cuneiform of the 1st metatarsal dorsiflexes the foot is the | tibialis anterior
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| which muscle raises the shoulders and also hyperextends the head | trapezius
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