Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of a Muscle Fiber.

Slides:



Advertisements
Similar presentations
Muscles and Muscle Tissue
Advertisements

Muscle Physiology.
The Muscular System.
Chapter 6 The Muscular System
Chapter 6 The Muscular System
The Muscular System.
How does a muscle work? Remember, muscles can only contract so they can only pull, not push. And it needs certain parts to do this.
The Muscular System.
ELAINE N. MARIEB EIGHTH EDITION 6 Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation by.
Objective 3 Describe and diagram the microscopic structure of skeletal muscle fibers.
The Muscular System.
Muscular & Skeletal Systems. Figure 30.8_1 Muscle Several muscle fibers Single muscle fiber (cell)
Skeletal Muscle Characteristics
7.2 Microscopic Anatomy and Contraction of Skeletal Muscle
The Muscular System.
MUSCLE CONTRACTION. Microscopic Anatomy of Skeletal Muscle Sarcomere Contractile unit of a muscle fiber Figure 6.3b.
Muscle Contraction.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Contraction.
The Muscular System 1.
Muscle & Muscle Tissue. Types of Muscle Tissue Skeletal Are striated Controlled voluntarily Tires easily.
The Myofibril. Each muscle fiber (muscle cell) is made up of rod like myofibrils that run parallel to the length of the muscle fiber. They contain the.
Muscles are made of many individual cells called fibers The Fascia connects the individual fibers to form a muscle and it separates muscles from each.
Muscle Types pgs Microscopic Anatomy of Skeletal Muscle pgs *emphasis will be placed on skeletal muscle.
Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 6.1 – 6.17 Seventh Edition Elaine.
Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 6.1 – 6.17 Seventh Edition Elaine.
Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 6.1 – 6.17 Seventh Edition Elaine.
 Produce skeletal movement  By contraction of muscle fibers  True of all = cardiac, smooth, skeletal  Maintain posture/body position  Some muscles.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Types.
Musculo-Skeletal Anatomy Making the body move!. Goals Important muscle groups to know Review muscle functions, types, and general anatomy In-depth look.
ELAINE N. MARIEB EIGHTH EDITION 6 Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation by.
Essentials of Anatomy and Physiology Fifth edition Seeley, Stephens and Tate Slide 2.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin.
Muscle Review. Myosin Actin What separates a sarcomere? Z – lines (disc)
Muscular System. Muscle Video Characteristics of Muscles Skeletal and smooth muscle cells are elongated (muscle cell = muscle fiber) Contraction of muscles.
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal Muscle Attachments  Epimysium blends into a connective tissue attachment.
Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 6.1 – 6.17 Seventh Edition Elaine.
The Muscular System Slide 6.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Muscles are responsible for all types of body.
Chapter 9 Muscles and Muscle Tissue
Muscular System Notes. Microscopic Muscle Anatomy  Myfibrils  About 1-2 micrometers in diameter  Length of a muscle fiber  Composed of multiple myofilaments.
PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.
The Muscular System Muscles are responsible for all types of body movement Three basic muscle types are found in the body Skeletal muscle Cardiac muscle.
Thursday, November 12, 2015 Put muscular worksheet in the blue basket Get a textbook Get a highlighter Get out paper & something to write with.
Skeletal Muscle Microscopic Anatomy Chapter 10. Microscopic Anatomy Muscle fibers = muscle cells: long and multinucleate Sarcolemma: cell membrane myoglobinSarcoplasm:
Gross Anatomy of Skeletal Muscle
Muscles. Skeletal Muscle Introduction Movement is a fundamental characteristic of all living organisms Three types of muscular tissue—skeletal,
PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.
Muscular Contraction.
Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 6.1 – 6.17 Seventh Edition Elaine.
ELAINE N. MARIEB EIGHTH EDITION 6 Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation by.
Microanatomy of Muscles Ch. 6b. Microscopic Anatomy of Skeletal Muscle Slide 6.9a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings.
ELAINE N. MARIEB EIGHTH EDITION 6 Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation by.
The Muscular System.
Naming Skeletal Muscles
Bell Ringer Three basic muscle types are found in the body
Chapter 6 The Muscular System
Movement is brought about my muscles controlling a Skelton
Chapter 6 The Muscular System
Chapter 6 The Muscular System
Essentials of Anatomy and Physiology
Skeletal Muscle Microscopic Anatomy
Chapter 6 The Muscular System
THE MUSCLE CELL.
Chapter 8: Muscular System
Arrangement of a Muscle
The Muscular System.
Microscopic Anatomy of Skeletal Muscle Fibers
Muscle Anatomy.
Skeletal Muscle Microscopic Anatomy
Anatomy of Skeletal Muscle
Types of Myofilaments.
Presentation transcript:

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of a Muscle Fiber

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of a Muscle Fiber  Sarcolemma—specialized plasma membrane  Sarcoplasm- cytoplasm of muscle cells; contains large amounts of stored glycogen and an oxygen-binding protein, myoglobin  Sarcoplasmic reticulum— specialized smooth endoplasmic reticulum Stores and releases calcium Surrounds the myofibril

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of a Muscle Fiber  Myofibrils- long organelles inside muscle cell extending the entire length of the cell; hundreds to thousands in each fiber/cell (80% of cell volume)

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of the Myofibril  Sarcomere— repeating unit along the myofibril contractile unit of a muscle fiber made of myofilaments

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of the Sarcomere  Myofilaments  2 Types in a sarcomere 1.Actin filaments Thin filaments  Composed of the protein actin  Anchored to the Z disc (which is a membrane)

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of the Sarcomere 2. Myosin filaments Thick filaments =  Composed of the protein myosin  Has ATPase  Myosin filaments have heads (extensions, or cross bridges)  Myosin and actin overlap somewhat

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of Myofilament Figure 6.3c

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of Skeletal Muscle  Myofilaments are aligned to give distinct bands  I band = light band  Contains only actin (thin) filaments  A band = dark band  Contains the entire length of the mysosin (thick) filaments

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings

Microscopic Anatomy of the Sarcomere striations - repeating series of dark and light bands A bands- dark bands -H zone- lighter stripe in midsection of an A band; visible when muscle is relaxed -M line- dark line bisecting each H zone I bands- light bands - Z line- dark line bisecting each I band

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle relaxed- H zone easy to see

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Microscopic Anatomy of Skeletal Muscle Figure 6.3b

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.