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BIO 141- QUIZ #5 QUESTIONS AND ANSWERS | GRADED A

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BIO 141- QUIZ #5 QUESTIONS AND ANSWERS | GRADED A

Institution
BIO 141
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BIO 141

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BIO 141- QUIZ #5 QUESTIONS AND
ANSWERS



Which of the following characteristics do neurons and muscles share?

Elasticity
Contractility
Accountability
None of these
Extensability - Correct Answers -answer: None of these

Excitability

The function of the sarcomere is best described by which of the following statements?

A sarcomere is the organization of motor units in a muscle.
A sarcomere is the protective covering of a muscle cell.
A sarcomere is the organization of proteins (myofilaments) in a myofibril
A sarcomere is the organization of muscle cells in the muscle. - Correct Answers -
answer: A sarcomere is the organization of proteins (myofilaments) in a myofibril

True or False: A whole muscle contraction is the result of one sarcomere shortening -
Correct Answers -answer: false

Which of the following places the events in the correct order they occur during excitation
and contraction?

Action potential travels down T-tubule --> Calcium released from sarcoplasmic reticulum
--> Troponin binds to calcium --> Myosin interacts with actin -->Active sites of actin are
exposed

Calcium released from sarcoplasmic reticulum -->Action potential travels down T-tubule
--> Troponin binds to calcium --> Active sites of actin are exposed -->Myosin interacts
with actin

Action potential travels down T-tubule --> Calcium released from sarcoplasmic reticulum
--> Troponin binds to calcium --> Active sites of actin are exposed --> Myosin interacts
with actin
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