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- 1. Multiple ChoiceWhat is the name of the thick myofilaments?ActinMyosinMyoglobinTitan
- 2. Multiple ChoiceWhat is the name of the thin myofilaments in the muscle cell?ActinMyosinMyoglobinTitan
- 3. Multiple ChoiceWhat is the structure that stores the calcium in the muscle cell.SarcoplasmSarcolemmaSarcoplasmic ReticulumMyoglobin
- 4. Multiple ChoiceThe contractile unit of a muscle is called the __________.SarcolemmaSarcoplasmic reticulumSarcoplasmSarcomere
- 5. Multiple Choice
Axon terminal is represented by1234 - 6. Multiple ChoiceNumber 3 represents which of the following eventsaction potential reaches the axon terminalsodium rushes into the muscle fiberpotassium leaving the muscle fiberACh crossing the synaptic cleft
- 7. Multiple ChoiceContractions are generated byshortening of thick filamentsshortening of thin filamentssliding of thin filaments past thick filaments"accordian-like" folding of thick and thin filaments
- 8. Multiple ChoiceWhat are the two ions transported across the membrane in an action potential?O2- and K+K+ and Na+Ca+2 and B+3Na+1 and Cl
- 9. Multiple Choiceenzyme that breaks down the muscle cell neurotransmitter and ends the impulselactasesucraselipaseacetylcholinterase
- 10. Multiple ChoiceOnce calcium is released, it willattaches to myosin headattaches to receptorsattaches to tropomyosinattaches to troponin
- 11. Multiple ChoiceZ representsDendriteAxon TerminalNeurotransmittersSynapse
- 12. Multiple Choice___ and ___ are regulatory proteins bound to actin.Troponin and tropomyosinMyosin and actinCalcium and OxygenGlycogen and hemoglobin
- 13. Multiple ChoiceThe axon terminal is represented by78910
- 14. Multiple ChoiceThe mitochondria is represented by9101112
- 15. Multiple ChoiceThe sarcolemma is represented by9101112
- 16. Multiple ChoiceThe synaptic vesicles with ACh is represented by78910
- 17. Multiple ChoiceThe receptors are represented by891011
- 18. Multiple ChoiceMyosin is represented by the letterABCD
- 19. Multiple ChoiceThe actin is represented by the letterABCD
- 20. Multiple ChoiceThe A band is represented byABCD
- 21. Multiple ChoiceThe H-zone is represented by the letterABCD
- 22. Multiple ChoiceThe I band is represented by the letterABCD
- 23. Multiple ChoiceActin is represented byABCD
- 24. Multiple ChoiceList the structures of the muscle organ from smallest to largestsarcomere, muscle fiber, fascicle, muscle organfascicle, muscle organ, myofibrilfascicle, sarcomere, muscle organ
- 25. Multiple ChoiceWhat is the name of the contractile unit in a muscle cell?fasciclesarcomeretendonendomysium
- 26. Multiple ChoiceWhat two chemicals are necessary for muscle contraction to occur?Niacin and PotassiumCalcium and ATPSodium and Potassium
- 27. Multiple ChoiceWhat is not a feature of muscles?ContractilityExtensibilityFascicity
- 28. Multiple ChoiceWhat is the connective tissue covering of a muscle fascicle?endomysiumperimysium
- 29. Multiple ChoiceWhat is the name of the molecule that has double heads and pulls the actin towards the center of the sarcomere?fasciclesarcoplasmmyosinAch
- 30. Multiple ChoiceThe neurotransmitter that signals muscle contraction is called...AchMyosinActinCalcium
- 31. Multiple Choicea bundle of muscle fibersactinmysoinfasciclesarcomere
- 32. Multiple Choicethe thin filament in muscle cellsmyosinactinmyoglobinhemoglobin
- 33. Multiple Choicethe cell membrane of a muscle cellsarcoplasmsarcolemmasarcomeremyofibril
- 34. Multiple Choicethe thick filament in muscle cellsactinmyosinhemoglobinmyofibril
- 35. 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
- 36. Multiple Choicethe chemical that accumulates in muscles when oxygen is depletedmyoglobinhemoglobinlactic acidcarbon dioxide
- 37. Multiple Choicesegment of myofibril extending from one z-line to the nextsarcolemmasarcoplasmsarcomerefascicle
- 38. Multiple Choicestates that the muscle fibers shorten as the actin and myosin filaments pull on each otherthreshold stimulus theorysliding filament theoryneurotransmitter theory
- 39. Multiple Choicecontractile filament; may be thick or thincontractile filament; may be thick or thinfasciclesarcomeremyofilament
- 40. Multiple ChoiceWhat is required in order to allow the myosin head to bind to the actin binding site?glucoseglycogenATPthe Na+/K+ pump
- 41. Multiple ChoiceUses oxygen to break down glucosedirect phosphorylationanaerobic glycolysisaerobic respiration
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