Anatomy & Physiology
Anatomy & Physiology
3rd Edition
ISBN: 9781259398629
Author: McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher: Mcgraw Hill Education,
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Question
Chapter 11, Problem 1DYB
Summary Introduction

Concept introduction: Muscle is defined as a type of soft tissue found in animals and humans. There are three types of muscles such as striated muscle, non-striated, and cardiac muscles. It is composed of actin and myosin protein filaments that slide into one another and cause contraction of the muscle.

Expert Solution & Answer
Check Mark

Answer to Problem 1DYB

Correct answer: Agonist is the primary muscle that produces a movement. Therefore, option b. is correct.

Explanation of Solution

Reason for the correct statement:

Agonist is also known as a prime mover. This muscle contracts primarily to produce a particular movement, such as extending the forearm. Therefore, this muscle initiates movement.

Option b. is given as “It is the primary muscle that produces a movement”.

Agonist is the primary muscle that produces a movement. It is the accurate statement about agonist. Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “It opposes the function of the prime mover”. Antagonist muscle is a type of muscle that opposes the function of the prime mover. Hence, option a. is incorrect.

Option c. is given as “Its function primarily to stabilize the joint”. Antagonist stabilizes the joint. Hence, option c. is incorrect.

Option d. is given as “Its muscle fibers are always circular in structure”. Agonist is a type of muscle that only provides shape to muscle. Hence, option d. is incorrect.

Hence, options a., c., and d. are incorrect.

Conclusion

Agonist is a muscle and is also called prime mover as it contracts to initiate the movement of muscles.

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Chapter 11 Solutions

Anatomy & Physiology

Ch. 11.3 - Prob. 6LOCh. 11.3 - Prob. 7LOCh. 11.3 - Prob. 6WDLCh. 11.3 - Prob. 7WDLCh. 11.3 - Prob. 8LOCh. 11.3 - Prob. 9LOCh. 11.3 - Which extrinsic eye muscles abduct the eye (move...Ch. 11.3 - Prob. 10LOCh. 11.3 - Prob. 11LOCh. 11.3 - Prob. 12LOCh. 11.3 - Prob. 9WDLCh. 11.3 - Prob. 10WDLCh. 11.3 - Prob. 13LOCh. 11.3 - Prob. 1WDTCh. 11.3 - List the four suprahyoid muscles, and describe a...Ch. 11.3 - Prob. 14LOCh. 11.3 - Which neck muscles extend the neck? Which neck...Ch. 11.4 - Prob. 15LOCh. 11.4 - Prob. 16LOCh. 11.4 - Which muscles form the erector spinae, and what...Ch. 11.5 - Prob. 17LOCh. 11.5 - Prob. 18LOCh. 11.5 - Prob. 2WDTCh. 11.5 - Prob. 14WDLCh. 11.5 - How is the diaphragm involved in respiration?Ch. 11.6 - LEARNING OBJECTIVES 19. List the four pairs of...Ch. 11.6 - Prob. 20LOCh. 11.6 - What are the main actions of the abdominal...Ch. 11.7 - Prob. 21LOCh. 11.7 - Prob. 22LOCh. 11.7 - Prob. 17WDLCh. 11.8 - Prob. 23LOCh. 11.8 - Prob. 18WDLCh. 11.8 - Prob. 24LOCh. 11.8 - Prob. 25LOCh. 11.8 - Prob. 19WDLCh. 11.8 - Identify the rotator cuff muscles, and describe...Ch. 11.8 - Prob. 26LOCh. 11.8 - Prob. 27LOCh. 11.8 - Prob. 3WDTCh. 11.8 - What are the muscles in the anterior compartment...Ch. 11.8 - Prob. 22WDLCh. 11.8 - Prob. 28LOCh. 11.8 - Prob. 29LOCh. 11.8 - Prob. 23WDLCh. 11.8 - What muscles in the posterior compartment move the...Ch. 11.8 - Prob. 30LOCh. 11.8 - Prob. 25WDLCh. 11.9 - Prob. 31LOCh. 11.9 - Prob. 32LOCh. 11.9 - Prob. 26WDLCh. 11.9 - Prob. 33LOCh. 11.9 - LEARNING OBJECTIVES 34. Describe the muscles of...Ch. 11.9 - Prob. 27WDLCh. 11.9 - Prob. 35LOCh. 11.9 - Prob. 36LOCh. 11.9 - Prob. 28WDLCh. 11.9 - Prob. 37LOCh. 11.9 - WHAT DO YOU THINK? 4 The extensor digitorum...Ch. 11.9 - Prob. 29WDLCh. 11 - Prob. 1DYBCh. 11 - Prob. 2DYBCh. 11 - _____ 3. When this large muscle contracts, the...Ch. 11 - Prob. 4DYBCh. 11 - Prob. 5DYBCh. 11 - _____ 6. The dorsal interossei muscles in the hand...Ch. 11 - Prob. 7DYBCh. 11 - Prob. 8DYBCh. 11 - Prob. 9DYBCh. 11 - Prob. 10DYBCh. 11 - Prob. 11DYBCh. 11 - Which muscles of facial expression do you use to...Ch. 11 - Distinguish between suprahyoid and infrahyoid...Ch. 11 - What is the effect of contracting the abdominal...Ch. 11 - What movements are possible at the glenohumeral...Ch. 11 - Identify the compartments of the arm (brachium),...Ch. 11 - Prob. 17DYBCh. 11 - Prob. 18DYBCh. 11 - What leg muscles allow a ballet dancer to rise up...Ch. 11 - Which muscles are responsible for foot inversion?Ch. 11 - Prob. 1CALCh. 11 - Prob. 2CALCh. 11 - Prob. 3CALCh. 11 - Prob. 4CALCh. 11 - Prob. 5CALCh. 11 - Prob. 1CSLCh. 11 - While training on the balance beam, Pat slipped...Ch. 11 - Prob. 3CSLCh. 11 - Why is it more difficult for Eric to lift a heavy...
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