Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 35.3, Problem 1TYK
Summary Introduction

Introduction:

The main function of muscles is to support the locomotion or movement of an organism. The muscle fibers collectively form the “muscular system.” This system generates the force necessary for the motility of the organism.

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Which of the following is NOT correct regarding muscle contraction? O Ca++ in the sarcoplasm returns to the nucleus to be stored ATP needs to be present for muscle relaxation A neurotransmitter is released at the neuromuscular junction ATP needs to be present for muscle contraction
Skeletal muscle will be released in its contracted (rigor) state when: Group of answer choices ATP is hydrolyzed into forming ADP and inorganic phosphate. ATP binds to the myosin head. ADP is dissociated from the myosin head. ATP binds to the actin G-molecule.
Muscle contraction can occur when: is it 1,2,3,4? A bands lengthen. myosin filaments shorten. sarcomeres shorten. I bands remain unchanged
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