Banding pattern Banding pattern seen in the electron microscope Banding pattern seen in the polarizing microscope.

Slides:

Advertisements

Similar presentations

Agenda 12/2/13 White board review EVERY student needs a white board.

Advertisements

Chapter 10 Muscular Tissue

Muscle Physiology.

Skeletal Muscle Contraction

Chapter 6 The Muscular System

Chapter 6 The Muscular System

The Muscular System. Muscular System Functions MOVEMENT MOVEMENT Maintain Posture Maintain Posture Stabilize Joints Stabilize Joints Generate HEAT Generate.

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.

1. What are the three types of muscles found in the muscular system A. Skeletal, cardiac, muscle fibers B. Skeletal, cardiac, smooth C. Skeletal, smooth,

Chapter 9 Muscles and Muscle Tissue

The Muscular System. MUSCULAR SYSTEM Types of Muscle Tissue: Skeletal, Smooth, and Cardiac Skeletal, aka “striated” voluntary – attached to bones and.

Muscle Bundle = group of muscle fibers (muscle cells) that function together and are bound together by fascia (connective tissue). Examples: biceps brachii,

Muscle Structure and Function

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Overview  The three types of muscle tissue are skeletal, cardiac, and.

Contraction of skeletal muscle. Learning objectives What evidence supports the sliding filament mechanism of muscle contraction? How does the sliding.

Muscle Tissue Specialized for contractions Specialized for contractions Elongated cells Elongated cells Unique terms to describe components of muscle.

7.2 Microscopic Anatomy and Contraction of Skeletal Muscle

Skeletal Muscle Key words:. Overview of the Muscle Fiber Structure Muscle fibers (cells) are composed of myofibrils Myofibrils are composed of myofilaments.

The Muscular System.

Muscle Contraction Tendon – cord of dense fibrous tissue attaching the muscle to a bone. Epimysium – the sheath of fibrous connective tissues surrounding.

MUSCLE CONTRACTION. Microscopic Anatomy of Skeletal Muscle Sarcomere Contractile unit of a muscle fiber Figure 6.3b.

Muscle Contraction.

Cardiac Muscle Involuntary –heart only Contracts & relaxes continuously throughout life –Contracts without nervous stimulation! –A piece of cardiac muscle.

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Contraction.

Lecture # 17: Muscular Tissue

The Muscular System 1.

Exercise 14 Microscopic Anatomy, Organization, and

Pages  Stimulus generated capabilities: ◦ Irritability (also called responsiveness)—ability to receive and respond to a stimulus ◦ Contractility—ability.

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.

Essentials of Anatomy and Physiology Fifth edition Seeley, Stephens and Tate Slide 2.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin.

Everything you didn’t know you wanted to know.. Microscopic Anatomy of Skeletal Muscle Sarcolema: Plalsma membrane of cell (fiber) Myofibril: Organelle.

Flash Cards Chapter

They are specialised effectors that contract to cause movement

Muscle Review. Myosin Actin What separates a sarcomere? Z – lines (disc)

Exercise 14 Microscopic Anatomy, Organization, and

Chapter 11 Physiology of the Muscular System. Introduction Muscular system is responsible for moving the framework of the body In addition to movement,

Sensory and Motor Mechanisms – chpt 49-. I. Anatomy & physiology of Muscular system n A. 3 types of muscle tissue –1. skeletal muscle aka striated muscle–

The Muscular System Slide 6.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Muscles are responsible for all types of body.

Filaments Resting state Electrical impulse (Action Potential) reaches axon terminal.

Synapse – The site of connection between a neuron and a cell. Neurotransmitter – A chemical released at the neuron’s synapse that communicates with the.

Muscle Physiology Dynamics of Muscle Contraction MMHS Anatomy.

Muscle Tissue Specialized for contraction Elongated cells

Neuromuscular Junction and Major Events of Muscle Contraction Quiz Review.

Muscular System The 3 Types of Muscles SKELETAL MUSCLE STRUCTURE.

Microscopic Anatomy of the Skeletal Muscles Taking a look at the individual muscle fiber and how it works with other fibers.

MUSCULAR SYSTEM Structure and Function. Skeletal Muscle Properties 1. Excitability = ability to receive and respond to a stimulus  Also called irritability.

Connective Tissue Terminology _________________- each individual skeletal muscle fiber is surrounded by this delicate connective tissue layer. –_________________-

Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings WHOLE MUSCLE CONTRACTION:PART 1 Motor units All the muscle fibers innervated.

Section Sarcolemma- plasma membrane of a muscle fiber 2. Sarcoplasm- cytoplasm 3. Sarcoplasmic reticulum- smooth ER that stores Ca Myofibrils-

Organization of Skeletal Muscles

2. Striation Pattern of Sarcomere

Quiz 7 The Muscular System.

Chapter 6 The Muscular System

Neuromuscular Function – 4.1

Key diagrams, animations and quizzes

Introduction The Muscular System.

Introduction The Muscular System.

Chapter 6 The Muscular System

Chapter 6 The Muscular System

Essentials of Anatomy and Physiology

NOTES: The Muscular System (Ch 8, part 2)

Anatomy & Physiology Ms. Cohen

Chapter 6 The Muscular System

THE MUSCLE CELL.

The Muscular System.

Activation of the sarcomere

Do now activity #1 What are the 3 types of muscle?

Presentation transcript:

Banding pattern Banding pattern seen in the electron microscope Banding pattern seen in the polarizing microscope

Light bands: I bands (I-LIGHT).Thin filaments only Dark bands: A bands (A-DARK).overlapping thick and thin filaments. Z line(Z disc) : dark line in the middle of an I- band.

H-zone : a lighter, central region in the middle of a dark A- band. Only thick filaments. Sarcomere : runs from Z-line to Z-line (functional contractile unit)

Sliding filament hypothesis of contraction Nerve impulses carried from brain/spinal cord to muscle by the axon of a motor neuron Axon meets muscle fiber at the neuromuscular junction(myoneural junction) Axon releases a chemical neurotransmitter called acetrylcholine, which binds to sarcolemma. A nerve impulse is generated in sarcolemma and it passes down the t-tubules. As a result the sarcoplasmic reticulum releases Ca++ ions

MUSCLE CELL OR FIBER

Sliding filament hypothesis of contraction Ca++ ions bind to thin filament This helps thick filament attach to the thin filament As a result thin filament is drawn further into A band. Myofilaments slides over one another; sarcomere shortens; muscle contracts. When nerve impulse stops,Ca++ returns to the sarcoplasmic reticulum and the myofilaments slide back to their resting state.