Anatomy & Physiology
Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Chapter 11, Problem 7RQ

Which arrangement best describes a bipennate muscle?

  1. The muscle fibers feed in on an angle to a long tendon from both sides.
  2. The muscle fibers feed in on an angle to a long tendon horn all directions.
  3. The muscle fibers feed in on an angle to a long tendon horn one side.
  4. The muscle fibers on one side of a tendon feed into it at a certain angle and muscle fibers on the other side of the tendon feed into it at the opposite angle.

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Arrange the steps of muscle innervation and contraction in response to touching a hot plate. appendage is removed from stimulus v movement is produced muslce fibers work together to produce action muscle contraction occurs and the sarcomere shortens Myosin heads bind thin filament Calcium binds troponin Calcium is released T tubules carry the action potential to the sarcoplasmic reticulum Action potential is generated in the sarcolemma as a result of opened sodium channels The presynaptic cell releases acetylcholine Signal arrives at the neuromuscular junction Sensory receptors detect uncomfortable heat Afferent neurons carry impulse to the central nervous system Signal reaches the reflex arc in the central nervous system and is directed out through the anterior horn Signal travels through the motor units > |> > > |> > > > > > > > >
Which of the following statements is true regarding muscle contraction? When a muuscle contracts, the sarcomere remains the same size. When a muscle contracts, the H-zone becomes narrower (shortens). When a muscle contracts, the lighter I-band becomes wider. When a muscle contracts, the A-band shortens.
Which type of muscle fiber arrangement is most appropriate for the shoulder muscle that leads to larger forces and more movement, but with a disadvantage of less efficient use of muscles? Parallel or fusiform Unipinate Bipinnate Multipinnate

Chapter 11 Solutions

Anatomy & Physiology

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