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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Textbook Question
Chapter 10, Problem 38CTQ
Why does a motor unit of the eye have few muscle fibers compared to a motor unit of the leg?
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Chapter 10 Solutions
Anatomy & Physiology
Ch. 10 - Watch this video...Ch. 10 - Every skeletal muscle fiber is supplied by a motor...Ch. 10 - The release of calcium ions initiates muscle...Ch. 10 - Muscle that has a striped appearance is described...Ch. 10 - Which element is important in directly Triggering...Ch. 10 - Which of the following properties is not common to...Ch. 10 - The correct order for the smallest to the largest...Ch. 10 - Depolarization of the sarcolemma means ________....Ch. 10 - In relaxed muscle, the myosin-binding site on...Ch. 10 - According to the sliding filament model, binding...
Ch. 10 - The cell membrane of a muscle fiber is called...Ch. 10 - Muscle relaxation occurs when ________. calcium...Ch. 10 - During muscle contraction, the cross-bridge...Ch. 10 - Thin and thick filaments are organized into...Ch. 10 - During which phase of a twitch in a muscle fiber...Ch. 10 - Muscle fatigue is caused by ________. buildup of...Ch. 10 - A sprinter would experience muscle fatigue sooner...Ch. 10 - What aspect of creatine phosphate allows it to...Ch. 10 - Dmg X blocks ATP regeneration from ADP and...Ch. 10 - The muscles of a professional sprinter are most...Ch. 10 - The muscles of a professional marathon runner are...Ch. 10 - Which of the following statements is true? Fast...Ch. 10 - Which of the following statements is false? Slow...Ch. 10 - Cardiac muscles differ from skeletal muscles in...Ch. 10 - If cardiac muscle cells were prevented from...Ch. 10 - Smooth muscles differ from skeletal and cardiac...Ch. 10 - Which of the following statements describes smooth...Ch. 10 - From which embryonic cell type does muscle tissue...Ch. 10 - Which cell type helps to repair injured muscle...Ch. 10 - Why is elasticity an important quality of muscle...Ch. 10 - What would happen to skeletal muscle if the...Ch. 10 - Describe how tendons facilitate body movement.Ch. 10 - What are the five primary functions of skeletal...Ch. 10 - What are the opposite roles of voltage-gated...Ch. 10 - How would muscle contractions be affected if...Ch. 10 - What causes the striated appearance of skeletal...Ch. 10 - How would muscle contractions be affected if ATP...Ch. 10 - Why does a motor unit of the eye have few muscle...Ch. 10 - What factors contribute to the amount of tension...Ch. 10 - Why do muscle cells use creatine phosphate instead...Ch. 10 - Is aerobic respiration more or less efficient than...Ch. 10 - What changes occur at the cellular level in...Ch. 10 - What changes occur at the cellular level in...Ch. 10 - What would be the drawback of cardiac contractions...Ch. 10 - How are cardiac muscle cells similar to and...Ch. 10 - Why can smooth muscles conn act over a wider range...Ch. 10 - Describe the differences between single-unit...Ch. 10 - Why is muscle that has sustained significant...Ch. 10 - Which muscle type(s) (skeletal, smooth, or...
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- What is a motor unit? Why does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?arrow_forwardYou are training athletes for the 100-meter dash. They need muscles specialized for speed and strength, not endurance. What muscle characteristics would your training regimen aim to develop? How would you alter it to train a long-distance swimmer?arrow_forwardWhy does repeated stimulation of the muscle (at maximum stimulus) before it has completely recovered from the previous contraction lead to increasing force of contractions?arrow_forward
- Why will an increase in the strength of a stimulus cause an increase in the force of contraction in a whole muscle but not in a single muscle fiber?arrow_forwardHow can the body regulate how much force the muscle should generate?arrow_forwardIn the context of muscles, define (a) agonist, (b) antagonist, and (c) synergist. Why are there muscles that can “undo” actions produced by other muscles?arrow_forward
- What type of muscle fibers would you expect to find in the leg muscles of a well-trained marathon runner?arrow_forward________and______ muscles are striped because they have a regular alignment of sarcomeres.______and_______ muscles are usually not under conscious control._______ And________ muscles are interconnected by gap junctions.arrow_forwardWhat is the energy utilization involved in causing a muscle to contract ?arrow_forward
- If individual muscle fibers always contract the entire way when stimulated, how are we able to create precise and delicate movements with our bodies?arrow_forwardwhy does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?arrow_forwardAfter learning about muscle fiber types in his anatomy and physiology class, Alex started to notice differences in the color of the turkeymeat he ate for lunch. Some of the meat was very white and someof it was much darker. From the color of the meat, Alex guessedwhich muscles the bird used for maintenance of posture and/or slowmovements, such as walking, and which muscles it used for quickermovements, such as running or flying. What type of muscle fiberpredominates in white meat? In dark meat? Explain how the colorof the meat relates to the function of the muscle.arrow_forward
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