EP HUMAN BIOLOGY-MODIFIED MASTERING
8th Edition
ISBN: 9780134326436
Author: Johnson
Publisher: PEARSON CO
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Question
Chapter 6, Problem 9CR
Summary Introduction
To review:
Motor unit and effects of its size and number on muscle strength and fine motor control.
Introduction:
A motor unit is defined as a collection of single motor neurons and all the muscle cells it controls. A motor neuron can control more than one muscle cell, but each muscle cell can be controlled by only one neuron.
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Define motor unit and muscle twitch, and describe the events occurring during the three phases of a muscle twitch.
Describe a motor unit and how motor unit numberaffects muscle control.
Describe the important steps in muscle contraction.
Chapter 6 Solutions
EP HUMAN BIOLOGY-MODIFIED MASTERING
Ch. 6 -
1. Do you think we should continue to try to...Ch. 6 - Prob. 2QCCh. 6 - Describe how muscle contraction can resist...Ch. 6 - Describe how a muscle's origin and insertion...Ch. 6 - Describe the roles of calcium in muscle...Ch. 6 -
4. Explain what causes rigor mortis.
Ch. 6 - Prob. 5CRCh. 6 - Prob. 6CRCh. 6 - Prob. 7CRCh. 6 -
8. Compare and contrast how a constant degree of...
Ch. 6 - Prob. 9CRCh. 6 - Prob. 10CRCh. 6 - Prob. 1TYCh. 6 -
2. Which of the following choices arranges the...Ch. 6 - All of the following are functions of the muscular...Ch. 6 -
4. Which of the following happens during muscle...Ch. 6 -
5. Botulism toxin inhibits the release of...Ch. 6 - The sliding filament mechanism describes the...Ch. 6 -
7. What is the first and most direct energy...Ch. 6 - As you clasp your hands in front of you and push...Ch. 6 -
9. All of the following may happen in response to...Ch. 6 - Which of the following is/are characteristic of...Ch. 6 - Which of the following is the site of calcium ion...Ch. 6 - What is the role of ATP in muscle function? a. ATP...Ch. 6 -
13. Which of the following would have motor units...Ch. 6 - Which type(s) of muscle cells can contract the...Ch. 6 - Prob. 15TYCh. 6 - Prob. 1AWKCh. 6 - Why do you think it is generally accepted medical...Ch. 6 - Prob. 3AWKCh. 6 - What would happen to a muscle if one of its...Ch. 6 - Prob. 5AWKCh. 6 - Prob. 6AWKCh. 6 - Prob. 7AWKCh. 6 - Prob. 8AWK
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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_forwardExplain the specific role of acetylcholine (ACh) instimulating a muscle fiber to contract.arrow_forwarddescribe the events that lead to muscle contraction starting at the level of the neuromuscular junction. Make sure to use the terms: myosin, actin, calcium, troponin, tropomyosin, T tubules, SR, myosin head, ATP.arrow_forward
- Describe some cause(s) of muscle fatigue and define this term clearly.arrow_forwardExplain how optimal skeletal muscle force (high muscle tension) can be achieved during a high intensity exercise. (Mention and explain how wave summation, motor recruitment summation, muscle length, and type of muscle fibers activated can affect muscle force).arrow_forwardExplain Muscle Activity?arrow_forward
- List and describe all of the major events that occur during a muscle contraction starting with the arrival of a motor command at a neuromuscular junction and ending with the shortening of the sarcomere.arrow_forwardProvide the levels of biological organization in a muscle.arrow_forwardDescribe the relationship between the resting muscle length and the strength of its contraction.arrow_forward
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