Textbook Question
Why do the three parts of the trapezius muscle have three different actions?
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Ch. 9 The Muscular System
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology24
- Ch. 2 The Chemistry of Life37
- Ch. 3 The Cell54
- Ch. 4 Histology46
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System35
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System41
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart28
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity41
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook
Chapter 9, Problem 2
If 'adductor' is part of the name of a muscle, what does that tell you about the muscle?
a. It is a wide muscle.
b. It is a long muscle.
c. It raises a body part.
d. It pulls a body part toward the midline.
Verified step by step guidance1
Understand the term 'adductor': In anatomy, the term 'adductor' refers to a muscle that performs the action of adduction, which means pulling a body part toward the midline of the body.
Review the function of adduction: Adduction is a movement that decreases the angle between the body part and the midline, such as bringing the arms or legs closer to the center of the body.
Analyze the options provided: a. 'It is a wide muscle' describes the shape, not the function. b. 'It is a long muscle' also describes the shape, not the function. c. 'It raises a body part' refers to elevation, not adduction. d. 'It pulls a body part toward the midline' correctly describes the function of an adductor muscle.
Relate the name to the function: Muscle names often reflect their primary action. Since 'adductor' is part of the name, it indicates the muscle's role in adduction.
Conclude that the correct answer is based on the muscle's function: The term 'adductor' specifically tells you that the muscle pulls a body part toward the midline, aligning with option d.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Muscle Naming Conventions
Muscle names often reflect their function, location, or shape. The term 'adductor' specifically indicates a muscle that brings a body part closer to the midline of the body. Understanding these naming conventions helps in identifying the role of various muscles in movement.
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Muscle Naming Example 1
Adduction
Adduction is a movement that decreases the angle between body parts, pulling them toward the midline. This is a fundamental concept in anatomy and kinesiology, as it describes how certain muscles function during various physical activities, such as bringing the arms or legs closer to the body.
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2:51Origin and Insertion Example 1
Muscle Function
Muscles are categorized based on their primary functions, such as flexion, extension, abduction, and adduction. Recognizing that 'adductor' muscles are responsible for pulling limbs toward the center of the body is crucial for understanding human movement and the mechanics of exercise.
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Related Practice
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The common function of all types of muscle tissue is to generate tension.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
A property of all muscle cells is elasticity, which means that the tissue is able to stretch.
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Textbook Question
Predict the location and function of the flexor digitorum profundus muscle based only on its name.
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Textbook Question
Explain how the diaphragm muscle is able to increase the size of the thoracic cavity even though it doesn't insert into a bone.
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