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- 1. Multiple ChoiceInvoluntaryskeletalcardiacsmoothsmooth and cardiac
- 2. Multiple Choicefound in organ wallsskeletalsmoothcardiacsmooth and cardiac
- 3. Multiple ChoiceStriatedsmoothcardiacskeletalskeletal and cardiac
- 4. Multiple Choiceattached to bonescardiacsmoothskeletal
- 5. Multiple Choicefound in heartsmoothcardiacskeletal
- 6. Multiple ChoiceWhat is the name of the thin filaments in the muscle cell?ActinMyosinMyoglobinTitan
- 7. Multiple ChoiceWhat is the name of the Thick filaments?ActinMyosinMyoglobinTitan
- 8. Multiple ChoiceThe contractile unit of a muscle is called the __________.SarcolemmaSarcoplasmic reticulumSarcoplasmSarcomere
- 9. Multiple ChoiceWhich of the following is true about cardiac musclesThey are found in the heart and voluntaryThey are found in the heart and autorhythmicThey are found in the heart and stomach, and are autorhythmicNone of the above
- 10. Multiple ChoiceThe Acetylcholine being released into the synaptic cleft is an example of a ______ stimulusIt's not a stimulusMechanicalelectricalChemical
- 11. Multiple ChoiceMuscle fibers that break down ATP quickly, so they can contract quickly.fast-twitch fibersslow-twitch fiberstwitchfasciitis
- 12. Multiple ChoiceAny of the elongated contractile threads found in striated muscle cells.originmyofibrilsmyosinfasciitis
- 13. Multiple ChoiceCondition of feeling tired or weary.tetanusactinfatigueorigin
- 14. Multiple ChoiceThe mechanism of muscle contraction.sarcoplasmic reticulumfasciitissliding filament mechanismmuscle cramps
- 15. Multiple ChoiceRegion where a motor neuron comes in close contact with a muscle cell.neurotransmittermuscular dystrophymuscle tensionneuromuscular junction
- 16. Multiple Choice
The plasma membrane of a skeletal muscle cell is called the:sarcomeremyofilamentsarcolemmasarcoplasm - 17. Multiple ChoiceSkeletal muscle fatigue occurs because ofinadequate numbers of mitochondriathe feedback loop is not workinga total lack of ATPinsufficient intracellular quantities of ATP due to excessive consumption
- 18. Multiple ChoiceCalcium:causes ATP binding to actinincreases the action potential along the sarcolemmabinds to proteins on myosintriggers the binding of myosin to actin
- 19. Multiple ChoiceThe mechanical force of contraction is generated by _________.the folding of actin & myosinthe disappearance of thin filamentsshortening of thin filamentsa sliding of thin filaments past thick filaments
- 20. Multiple ChoiceWhat occurs when muscles are not used?muscular dystrophybotoxatrophyrigor mortis
- 21. Multiple Choicethe neurotransmitter that gets a muscle contraction startedacetylcholineserotonindopamineacetylcholinterase
- 22. Multiple Choicea bundle of muscle fibersactinmysoinfasciclesarcomere
- 23. Multiple Choiceenzyme that breaks down the muscle cell neurotransmitter and ends the impulselactasesucraselipaseacetylcholinterase
- 24. Multiple Choicesituation in which muscle loses its ability to contract, due to being used strenuously for a long period of timemuscle painmuscle crampmuscle fatigueoxygen debt
- 25. Multiple Choicethe chemical that accumulates in muscles when oxygen is depletedmyoglobinhemoglobinlactic acidcarbon dioxide
- 26. Multiple Choicesegment of myofibril extending from one z-line to the nextsarcolemmasarcoplasmsarcomerefascicle
- 27. Multiple Choicethe cytoplasm of a muscle cellsarcolemmasarcoplasmsarcomerez band
- 28. Multiple Choicethe connection between the motor neuron and the muscle fiberaponeurosisendomysiumneuromuscular junctionepimysium
- 29. Multiple Choicesurrounds each muscle fiber within the fascicleendomysiumepimysiumperimysiummyoglobin
- 30. Multiple Choicelayer of connective tissue that surrounds a skeletal muscleepimysiumperimysiumendomysiumsarcoplasm
- 31. Multiple Choiceconnective tissue that extends inward from the epimysium separating muscle tissue into fasciclesendomysiumperimysyiumaponeurosistendon
- 32. Multiple Choicestates that the muscle fibers shorten as the actin and myosin filaments pull on each otherthreshold stimulus theorysliding filament theoryneurotransmitter theoryall or none principle
- 33. Multiple ChoiceEach myofibril consists of approximately _______________ sarcomeres1050010,000100,000
- 34. Multiple ChoiceA muscle ___________ contains a sarcolemma, sarcoplasm, myofilaments, and myofibrils.MyofibrilMotor End PlateFiberT-Tubule
- 35. Multiple ChoiceThe striated appearance of skeletal muscle results fromthe sarcoplasmic reticulumthe T-Tubule patternCisternae PlacementActin and Myosin Arrangement
- 36. Multiple ChoiceTropomyosin strands are held in position by which of the following?Troponin moleculesCalcium IonsATP moleculesMyosin Molecules
- 37. Multiple ChoiceAcetylcholinesterase is found within theSarcolemmaSynaptic CleftMyofibrilSarcomere
- 38. Multiple ChoiceThe ___________ contains vessicles filled with acetylcholine.Neuromuscular JunctionMotor End PlateAxon TerminalSynaptic Cleft
- 39. Multiple ChoiceWhich of the following occurs when tension production rises to a peak and very brief periods of relaxation occur?Tension PlateauResting PeriodComplete TetanusIncomplete Tetanus
- 40. Multiple ChoiceA single stimulus-contraction-relaxation sequence in a muscle fiber is known as a(n)Incomplete TetanusTwitchSummationLatent Period
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