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- 1. Multiple Choice
Region where a motor neuron comes in close contact with a muscle cell.
neurotransmitter
muscular dystrophy
muscle tension
neuromuscular junction / Motor End Plate
- 2. Multiple Choice
The gap between a neuron and a muscle cell: (#4 in the diagram)
synapse
sarcolemma
vesicle
Ca2+ ion
- 3. Multiple Choice
The neurotransmitter that is released into the synpase to trigger muscle contraction.
Acetylcholine
Protein Channel
Calcium Ion (Ca2+)
Syanptic Cleft
- 4. Multiple Choice
smallest unit of contraction in a muscle
sarcomere
motor unit
fascicle
myofibril
- 5. Multiple ChoiceThick filaments are in a myofibril areATPaseSarcoplasmic reticulumActinMyosin
- 6. Multiple ChoiceThin filaments in a myofibril areSarcomeresSarcoplasmActinMyosin
- 7. Multiple ChoiceWhat two chemicals are necessary for muscle contraction to occur?Niacin and PotassiumCalcium and ATPSodium and PotassiumAch and Potassium
- 8. Multiple ChoiceWhat is the structure that stores the Calcium in the muscle cell.SarcoplasmSarcolemmaSarcoplasmic ReticulumMyoglobin
- 9. Multiple ChoiceSkeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.Muscle cellNeuronGlandNone of the above
- 10. Multiple ChoiceThe energy needed to perform a muscle contraction comes directly fromATPOxygenGlucoseCalcium
- 11. Multiple ChoiceWhat is a crossbridge?Where myosin binds to actinWhere the calcium crosses into the cytoplasmWhere calcium binds with troponinNone of the answers are correct.
- 12. Multiple Choice
___ and ___ are proteins bound to actin, which control the binding sites.
Troponin and tropomyosin
Myosin and actin
Calcium and Oxygen
Glycogen and hemoglobin
- 13. Multiple Choice
Calcium:
causes ATP binding to actin
increases the action potential along the sarcolemma
binds to proteins on myosin
causes the troponin to move tropomyosin out of the binding site
- 14. Multiple ChoiceWhat state is the sarcomere in #1RelaxedContractingFully ContractedNone of the above
- 15. Multiple ChoiceWhat state is the sarcomere in #2RelaxedContractingFully ContractedNone of the above
- Answer choicesTagsAnswer choicesTags