Principles of Anatomy and Physiology
15th Edition
ISBN: 9781119329398
Author: Gerard J Tortora, Bryan Derrickson
Publisher: John Wiley & Sons Inc
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Chapter 10, Problem 15CP
Summary Introduction
To review:
The way in which the size of the motor units controls the degree of muscular movement.
Introduction:
A motor unit consists of a motor neuron and multiple muscle fibers innervated by the axonal terminals of the motor neuron. This combination brings about stimulation or contraction of a number of fibers by a single motor neuron.
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Chapter 10 Solutions
Principles of Anatomy and Physiology
Ch. 10 - To determine:
l. What features distinguish the...Ch. 10 - List the general functions of muscular tissue.Ch. 10 - 3. Describe the four properties of muscular...Ch. 10 - What types of fascia cover skeletal muscles?Ch. 10 - Why is a rich blood supply important for muscle...Ch. 10 - How are the structures of thin and thick filaments...Ch. 10 - What roles do contractile, regulatory, and...Ch. 10 - Prob. 8CPCh. 10 - To determined
9. How does sareomere length...Ch. 10 - Prob. 10CP
Ch. 10 - Which ATP-producing reactions are aerobic and...Ch. 10 - To determine:
12. Which sources provide ATP during...Ch. 10 - Prob. 13CPCh. 10 - Why is the term recovery oxygen uptake more...Ch. 10 - Prob. 15CPCh. 10 - What is motor unit recruitment?Ch. 10 - Prob. 17CPCh. 10 - Prob. 18CPCh. 10 - Prob. 19CPCh. 10 - Prob. 20CPCh. 10 - Prob. 21CPCh. 10 - On a cellular level, what causes muscle...Ch. 10 - What are the similarities among and differences...Ch. 10 - 24. What are the differences between visceral and...Ch. 10 - How are skeletal and smooth muscle similar? How do...Ch. 10 - 26. Which type of muscular tissue has the highest...Ch. 10 - Q. Which structures develop from myotomes,...Ch. 10 - Prob. 28CPCh. 10 - 29. Why do you think a healthy 30-year-old can...Ch. 10 - l. Weightlifter Jamal has been practicing many...Ch. 10 - Prob. 2CTQCh. 10 - Polio is a disease caused by a virus that can...
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- How does a muscle fiber incur an oxygen debt?arrow_forwardWhat physiologic functioning determines muscle strength? What adaptations occur with strength training?arrow_forwardWhat differences would you expect to see between amotor unit where muscular strength is more important thanfine control and another motor unit where fine control ismore important?arrow_forward
- How does the shortening of sarcomeres explain musclecontraction?arrow_forwardDefine motor unit and muscle twitch, and describe the events occurring during the three phases of a muscle twitch.arrow_forwardHow are ion channels affected by receptors that stimulatesmooth muscle contractions? That inhibit smooth musclecontractions?arrow_forward
- During increases in the force of skeletal-muscle contraction, what is the order of recruitment of the different types of motor units?arrow_forwardWhich of the following is thought to be cause of muscular fatigue? Decrease level of lactate within the muscle cell Decrease level of extracellular potassium outside of muscle cell Increased level of acetylcholinesterase in the synaptic cleft Increase level of intracellular ATP within muscle cell Increase level of phosphate within muscle cellarrow_forwardDescribe how each of the following factors influences motor unit recruitment: a) Increasing contraction speed b) Increasing force output c) Increasing fatiguearrow_forward
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