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