Textbook Question
What forms of energy reserves do resting skeletal muscle fibers contain?
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Ch. 10 Muscle Tissue
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
Chapter 10, Problem 19
Areas of the body where you would not expect to find slow fibers include the
(a) Back and calf muscles
(b) Eye and hand
(c) Chest and abdomen
(d) All of these
Verified step by step guidance1
Step 1: Understand what slow fibers are. Slow fibers, also known as slow-twitch muscle fibers or Type I fibers, are muscle fibers that contract slowly but are highly resistant to fatigue. They are specialized for endurance and continuous, prolonged activities.
Step 2: Identify the typical locations of slow fibers. Slow fibers are commonly found in muscles that maintain posture and perform sustained activities, such as the back and calf muscles, which are involved in standing and walking.
Step 3: Consider muscles that require quick, precise, and rapid movements. Muscles in the eye and hand are designed for fast, fine motor control and typically contain more fast-twitch fibers rather than slow fibers.
Step 4: Analyze the options given: (a) Back and calf muscles are rich in slow fibers; (b) Eye and hand muscles are not expected to have many slow fibers; (c) Chest and abdomen muscles have a mix but generally more fast fibers for quick movements; (d) All of these is a general option.
Step 5: Conclude that areas where you would not expect to find slow fibers are those requiring rapid, precise movements, such as the eye and hand muscles.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Muscle Fiber Types
Muscle fibers are classified into slow-twitch (Type I) and fast-twitch (Type II) fibers. Slow fibers contract slowly but are resistant to fatigue, making them ideal for endurance activities. Fast fibers contract quickly but fatigue faster, suited for rapid, powerful movements.
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The Muscle Fiber
Distribution of Slow Fibers in the Body
Slow fibers are commonly found in muscles involved in posture and sustained activities, such as the back and calf muscles. These muscles require endurance and continuous contraction, which slow fibers support effectively.
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Muscle Function in Different Body Regions
Muscles in the eye and hand are designed for quick, precise movements and typically contain more fast fibers. In contrast, muscles in the chest and abdomen have mixed fiber types but generally fewer slow fibers compared to postural muscles.
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Related Practice
Textbook Question
How does cardiac muscle tissue contract without neural stimulation?
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Textbook Question
What structural feature of a skeletal muscle fiber propagates action potentials into the interior of the cell?
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Textbook Question
What is the calcium-binding protein in smooth muscle tissue?
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Textbook Question
Linda's father suffers an apparent heart attack and is rushed to the emergency room of the local hospital. The doctor on call tells her that he has ordered some blood work and that he will be able to tell if her father actually had a heart attack by looking at the blood levels of CK and cardiac troponin. Why would knowing the level of CK and cardiac troponin help to indicate if a person suffered a heart attack?
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Textbook Question
For each portion of a myogram tracing a twitch in a stimulated calf muscle fiber, describe the events that occur within the muscle fiber.
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