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Bio 253 Exam #3 Practice Questions with 100% Correct Answers
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Bio 253 Exam #3 Practice Questions with 100% Correct Answers what structure in skeletal muscle permits action potentials to penetrate deep into the muscle cell? - Answer️️ -T-tubules what molecule initiates cross bridge cycling in skeletal muscle by binding to troponin? - Answer️️ -Ca+...

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  • August 28, 2024
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  • 2024/2025
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  • bio 253 exam 3 practice questions with 100 corre

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©SOPHIABENNET@2024-2025 Thursday, August 22, 2024 10:21 AM


Bio 253 Exam #3 Practice Questions
with 100% Correct Answers

what structure in skeletal muscle permits action potentials to penetrate
deep into the muscle cell? - Answer✔️✔️-T-tubules

what molecule initiates cross bridge cycling in skeletal muscle by binding
to troponin? - Answer✔️✔️-Ca++

the link between actin and myosin in skeletal muscle is broken when the
myosin head binds a molecule of ____ - Answer✔️✔️-ATP

During skeletal muscle contractions, factor(s) that influence whole muscle
tension are ____, _____, ____ - Answer✔️✔️-# of motor unit recruited, length
of fiber at onset of contraction, frequency of stimulation

creatine phosphate is an important source of skeletal muscle ATP because -
Answer✔️✔️-it is catalyzed in the presence of ADP to produce creatine and
ATP

Which of the following statements about tetanus is true? - Answer✔️✔️-it is
a contraction of maximum strength, all fibers in a muscle are recruited
during tetanus, a maximum number of cross bridge sites are uncovered

during smooth muscle contraction, Ca++ activates? - Answer✔️✔️-
calmodulin




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