LL A&P:AN INTEGRATIVE APPROACH
LL A&P:AN INTEGRATIVE APPROACH
3rd Edition
ISBN: 9781260814507
Author: McKinley
Publisher: MCG
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 10, Problem 1DYB
Summary Introduction

Concept introduction: The primary cells that form a skeletal muscle are the skeletal muscle fibers. The skeletal muscle fibers have several specialized features. Like other cells, skeletal muscle cells have typical cellular features with the cytoplasm. The cytoplasm of skeletal muscle is specially known as sarcoplasm.

Expert Solution & Answer
Check Mark

Answer to Problem 1DYB

Correct answer: The unit of skeletal muscle structure that is composed of bundles of myofibrils enclosed within a sarcolemma and surrounded by a connective tissue covering called endomysium is a skeletal muscle fiber. Hence, the correct answer is option (d).

Explanation of Solution

Reason for the correct answer:

The skeletal muscle fiber is composed mostly of myofibrils that extend the muscle fiber length. It is enclosed within a sarcolemma that represents the plasma membrane of the skeletal muscle fiber and surrounded by the connective tissue covering known as endomysium. Voltage-gated channels are present within the membrane of sarcolemma. These channels include both voltage-gated K+ channels and voltage-gated Na+ channels that participate in conducting the electrical signal.

Option (d) is given as “skeletal muscle fiber”.

The unit of skeletal muscle structure that is composed of bundles of myofibrils enclosed within a sarcolemma and surrounded by a connective tissue covering called endomysium is a skeletal muscle fiber. Hence, the correct answer is option (d).

Reasons for incorrect answer:

Option (a) is given as “myofibril”.

The myofibril is composed of actin thin filaments and myosin thick filaments that are organized into the sarcomeres. Hence, option (a) is incorrect.

Option (b) is given as “fascicle”.

The skeletal muscle consists of multiple fascicles that are mainly composed of bundles of muscle fibers. Hence, option (b) is incorrect.

Option (c) is given as “myofilament”.

The myofilaments are the contractile proteins bundled within the myofibrils. Hence, option (c) is incorrect.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The unit of skeletal muscle structure that is composed of bundles of myofibrils enclosed within a sarcolemma and surrounded by a connective tissue covering called endomysium is known as skeletal muscle fiber.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Chapter 10 Solutions

LL A&P:AN INTEGRATIVE APPROACH

Ch. 10.2 - Prob. 7LOCh. 10.2 - LEARNING OBJECTIVES 8. Distinguish between thick...Ch. 10.2 - Prob. 9LOCh. 10.2 - Prob. 10LOCh. 10.2 - Prob. 2WDTCh. 10.2 - Draw and label a diagram of a sarcomere.Ch. 10.2 - Prob. 5WDLCh. 10.2 - Prob. 11LOCh. 10.2 - Prob. 12LOCh. 10.2 - Prob. 6WDLCh. 10.2 - Diagram and label the anatomic structures of a...Ch. 10.2 - Prob. 13LOCh. 10.2 - Prob. 8WDLCh. 10.3 - Prob. 14LOCh. 10.3 - What triggers the binding of synaptic vesicles to...Ch. 10.3 - Prob. 15LOCh. 10.3 - What two events are linked in the physiologic...Ch. 10.3 - Prob. 11WDLCh. 10.3 - Prob. 16LOCh. 10.3 - Prob. 3WDTCh. 10.3 - Prob. 12WDLCh. 10.3 - Describe the four processes that repeat in...Ch. 10.3 - What causes the release of the myosin head from...Ch. 10.3 - LEARNING OBJECTIVES 17. Discuss what happens to...Ch. 10.3 - Prob. 18LOCh. 10.3 - How do acetylcholinesterase and Ca2+ pumps...Ch. 10.4 - LEARNING OBJECTIVES 19. Describe how ATP is made...Ch. 10.4 - Prob. 20LOCh. 10.4 - Prob. 4WDTCh. 10.4 - Prob. 16WDLCh. 10.4 - What are the various means for making ATP...Ch. 10.4 - Prob. 21LOCh. 10.4 - Prob. 18WDLCh. 10.5 - Prob. 22LOCh. 10.5 - Prob. 19WDLCh. 10.5 - Prob. 23LOCh. 10.5 - Prob. 20WDLCh. 10.5 - Prob. 24LOCh. 10.5 - Prob. 21WDLCh. 10.6 - LEARNING OBJECTIVE 25. Describe what occurs in a...Ch. 10.6 - Prob. 5WDTCh. 10.6 - What events are occurring in a muscle that produce...Ch. 10.6 - Prob. 26LOCh. 10.6 - What is recruitment? Explain its importance in the...Ch. 10.6 - Prob. 27LOCh. 10.6 - Prob. 24WDLCh. 10.7 - Prob. 28LOCh. 10.7 - What is the function of skeletal muscle tone?Ch. 10.7 - LEARNING OBJECTIVE 29. Distinguish between...Ch. 10.7 - When you flex your biceps brachii while doing...Ch. 10.7 - LEARNING OBJECTIVE 30. Explain the length-tension...Ch. 10.7 - Prob. 27WDLCh. 10.7 - Prob. 31LOCh. 10.7 - How can muscle fatigue result from changes in each...Ch. 10.8 - LEARNING OBJECTIVE 32. Compare and contrast the...Ch. 10.8 - Prob. 29WDLCh. 10.8 - Prob. 33LOCh. 10.8 - Prob. 30WDLCh. 10.9 - Prob. 34LOCh. 10.9 - What are three anatomic or physiologic differences...Ch. 10.10 - Prob. 35LOCh. 10.10 - Prob. 32WDLCh. 10.10 - LEARNING OBJECTIVE 36. Compare the microscopic...Ch. 10.10 - Prob. 33WDLCh. 10.10 - Prob. 34WDLCh. 10.10 - Prob. 37LOCh. 10.10 - What are the steps of smooth muscle contraction?Ch. 10.10 - What unique characteristics of smooth muscle allow...Ch. 10.10 - Prob. 38LOCh. 10.10 - Prob. 37WDLCh. 10.10 - Prob. 38WDLCh. 10.10 - Prob. 39LOCh. 10.10 - LEARNING OBJECTIVES 40. Compare the location and...Ch. 10.10 - Prob. 39WDLCh. 10 - Prob. 1DYBCh. 10 - The physiologic event that takes place at the...Ch. 10 - In a skeletal muscle fiber, Ca2+ is released from...Ch. 10 - The bundle of dense regular connective tissue that...Ch. 10 - In excitation-contraction coupling, the transverse...Ch. 10 - During muscle contraction, the I band a. hides the...Ch. 10 - During a concentric contraction of a muscle fiber,...Ch. 10 - What event causes a troponin-tropomyosin complex...Ch. 10 - In sustained, moderate exercise, skeletal muscle...Ch. 10 - Skeletal muscle and cardiac muscle are similar in...Ch. 10 - Explain the structural relationship between a...Ch. 10 - Prob. 12DYBCh. 10 - Prob. 13DYBCh. 10 - Put the following skeletal muscle contraction...Ch. 10 - Explain the various means of providing ATP for...Ch. 10 - Explain why athletes who excel at short sprints...Ch. 10 - Explain why skeletal muscle generates the most...Ch. 10 - Prob. 18DYBCh. 10 - Describe the response of smooth muscle to...Ch. 10 - Prob. 20DYBCh. 10 - Prob. 1CALCh. 10 - One of the primary reasons that one individual is...Ch. 10 - Prob. 3CALCh. 10 - Rigor mortis occurs following death because a....Ch. 10 - Prob. 5CALCh. 10 - Prob. 1CSLCh. 10 - Describe the effect of the botulinum toxin, which...Ch. 10 - Smooth muscle is within the urinary bladder wall....
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
GCSE PE - ANTAGONISTIC MUSCLE ACTION - Anatomy and Physiology (Skeletal and Muscular System - 1.5); Author: igpe_complete;https://www.youtube.com/watch?v=6hm_9jQRoO4;License: Standard Youtube License