Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 7RC
What is the role of the zone of overlap in producing tension in a skeletal muscle?
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A) Assuming that each individual muscle fiber generates the same amount of tension, which of the following skeletal muscles will produce the greatest amount of overall tension when fully stimulated?
Muscle
Total Number of Muscle Fibers in Muscle
A
150
B
1000
C
600
Group of answer choices
Muscle A
Muscle B
Muscle C
B)The following list of events take place during a muscle contraction. Place the events in chronological order as they relate to a muscle contraction.
Calcium is released from the sarcoplasmic reticulum.
Myosin heads bind to actin.
An action potential arrives at the axon terminal of a motor neuron.
Calcium binds to troponin, displacing tropomyosin and exposing myosin head binding sites on actin.
Myosin heads undergo power stroke and actin slides over myosin towards M line of sarcomere.
Acetylcholine is released at the neuromuscular junction.
What factors determine the duration of an isotonic twitch in skeletal muscle? An isometric twitch?
What is the difference between the proximal and distal attachment of a skeletal muscle?
Chapter 9 Solutions
Human Anatomy (9th Edition)
Ch. 9 - 1. Active sites on actin become available for...Ch. 9 - Prob. 2RFTCh. 9 - Prob. 3RFTCh. 9 - 4. Another name for a muscle that is a prime mover...Ch. 9 - Prob. 5RFTCh. 9 - Prob. 6RFTCh. 9 - 7. The theory that explains muscle contraction is...Ch. 9 - Prob. 8RFTCh. 9 - Label the illustrations to the right as...Ch. 9 - Prob. 1RC
Ch. 9 - 2. The ability to recover from injuries in older...Ch. 9 - Prob. 3RCCh. 9 - Prob. 4RCCh. 9 - Prob. 5RCCh. 9 - A motor unit from a skeletal muscle contains 1500...Ch. 9 - 7. What is the role of the zone of overlap in...Ch. 9 - Several anatomy students take up weight lifting...Ch. 9 - Prob. 2CT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is a motor unit? Why does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?arrow_forwardHow do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP and calcium play?arrow_forwardIn the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.arrow_forward
- What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal muscle?arrow_forwardHow does the arrangement of myofilaments produce the characteristic striations of skeletal muscle fibers?arrow_forwardThe total tension a muscle can develop depends upon two factors. What are they?arrow_forward
- Describe what is meant by muscle fiber "cross-bridges". What occurs to enable movement of the cross-bridges?arrow_forward3) List and define the organizational structure of skeletal muscle beginning with the sacrcomere up ABC to a whole muscle. 4) Explain the differences between the zones and bands of a sarcomere. 5) List and explain the differences between contractile and non-contractile proteins. 6) What are the agonists, synergists, and antagonists to go from sitting to standing from a chair. 7) Provide an every day example of each of the 3 types of muscle actions. Name the muscle involved as well as the movement. 8) Why do we store energy as ATP and resynthesize it, instead of just storing all we need. 9) What are the differences between resting, steady state, and maximal metabolic rate? 10) Why would someone measure arm circumference? How would that be helpful? 11) MRI results in a grayscale of 0 (black) to 256 (white) for each pixel of tissue. How do we tell the difference between different types of tissue in the cross section of a limb (arm or leg, e.g. what's the difference between muscle and fat,…arrow_forwardWhat conditions will produce the maximum tension in a skeletal muscle fiber?arrow_forward
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