Naming Skeletal Muscles

Slides:

Advertisements

Similar presentations

The Muscular System.

Advertisements

Muscle Tissue and Organization

Chapter 6 The Muscular System

Muscular system SKELETAL MUSCLE Skeletal muscle is made up of hundreds of muscle fibers –Fibers consists of threadlike myofibrils –Myofibrils composed.

The Muscular System.

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

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.

Topic 11: Human Health and Physiology

7.2 Microscopic Anatomy and Contraction of Skeletal Muscle

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 Cells & Muscle Fiber Contractions

Muscle & Muscle Tissue. Types of Muscle Tissue Skeletal Are striated Controlled voluntarily Tires easily.

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.

Muscles. Smooth muscle Found in the walls of hollow organs and the blood vessels Lack striations Contain less myosin Cannot generate as much tension as.

Exercise 14 Microscopic Anatomy, Organization, and

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal Muscle Attachments  Epimysium blends into a connective tissue attachment.

Warm-Up Based on what you know about Latin root words, what do you think these terms refer to? Sarcomere Sarcoplasm Myofibril Epimysium Perimysium Endomysium.

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.

MUSCLES I. GENERAL INFORMATION HOW MUSCLES ARE NAMED LOCATION Ex: TEMPORALIS NUMBER OF ORIGINS Ex: BICEPS BRACHII & TRICEPS BRACHII SIZE Ex: GLUTEUS.

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

Muscle Physiology Dynamics of Muscle Contraction MMHS Anatomy.

II. Skeletal Muscle Overview A. Skeletal Muscle Distinguishing Characteristics Striated Voluntary Multi-nucleated B. Functions Movement Maintain Posture.

Muscles & Motor Locomotion Why Do We Need All That ATP?

Three types of muscle Skeletal – attached to bone

Muscular System Notes. Microscopic Muscle Anatomy  Myfibrils  About 1-2 micrometers in diameter  Length of a muscle fiber  Composed of multiple myofilaments.

Skeletal Muscle Microscopic Anatomy Chapter 10. Microscopic Anatomy Muscle fibers = muscle cells: long and multinucleate Sarcolemma: cell membrane myoglobinSarcoplasm:

Muscular System The 3 Types of Muscles SKELETAL MUSCLE STRUCTURE.

Gross Anatomy of Skeletal Muscle

Chapter 6 The Muscle Anatomy. The Muscular System Functions  Movement  Maintain posture  Stabilize joints  Generate heat Three basic muscle types.

MUSCLES I. GENERAL INFORMATION HOW MUSCLES ARE NAMED LOCATION Ex: TEMPORALIS NUMBER OF ORIGINS Ex: BICEPS BRACHII & TRICEPS BRACHII SIZE Ex: GLUTEUS.

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

Muscular Contraction.

Muscle voluntary, striated involuntary, striated auto-rhythmic involuntary, non-striated evolved first multi-nucleated digestive system arteries, veins.

Muscle Tissue Chapter # 4 6/13/ Muscular System.

How do muscle cells contract ?. What is the structure of a muscle fiber ? The sarcolemma, or plasma membrane contains invaginations called T (transverse)

Muscles Skeletal muscles are stimulated to contract by nerves and act as effectors.

Muscles II: Microscopic Anatomy and Contraction

Parts of a Muscle.

Organization of Skeletal Muscles

Bell Ringer Three basic muscle types are found in the body

Chapter 6: Muscular System

Muscles (View Video).

Muscle Structure and Function

Muscle Structure and Function

Introduction The Muscular System.

Introduction The Muscular System.

Topic 11.2 Movement Bone and Muscle.

The Muscular System.

Anatomy & Physiology Ms. Cohen

The Muscular System.

Naming Skeletal Muscles

THE MUSCLE CELL.

Chapter 8: Muscular System

Arrangement of a Muscle

The Muscular System.

Microscopic Anatomy of Skeletal Muscle Fibers

Muscle Anatomy and Physiology

Naming Skeletal Muscles

Chapter 49 –Sensory and Motor Mechanisms

Muscular System Chapter 8.

Function of Muscles. Function of Muscles Characteristics of Muscles pg types: muscle cell = muscle fiber All muscles share some terminology Prefix.

Chapter 6 The Muscle Anatomy

Topic 7-3: Skeletal Muscle Fibers

LECTURE 3: Muscular System

The Muscular System Muscle Contractions

Function of Muscles. Function of Muscles Characteristics of Muscles pg types: muscle cell = muscle fiber All muscles share some terminology Prefix.

Presentation transcript:

Naming Skeletal Muscles Location (associated with bone; temporalis) Shape (deltoid = triangle, trapezius = trapezoid) Relative size (maximus, minimus, longus) Direction of muscle fibers (rectus = parallel to the midline, transversus, oblique) Number of origins (biceps, triceps, quadriceps) Location of attachments (sternocleidomastoid = sternum & clavicle origins, mastoid insertion) Action of muscle(flexor, extensor, adductor)

Anatomy of Muscle Fiber Multinucleate cell Up to 30 cm long Sarcolemma (plasma membrane) Sarcoplasm (cytoplasm) Myofibril = rodlike organelle Contains contractile element (sarcomeres) Alternating light (I) and dark (A) bands

Sarcomere Smallest contractile unit of muscle fiber Region between 2 successive Z discs

Sarcomere Protein myofilaments: Thick filaments = myosin protein Thin filaments = actin protein

Myofilaments Thick Filaments Thin Filaments Myosin head: forms cross bridges with thin filaments to contract muscle cell Tropomyosin: protein strand stabilizes actin Troponin: bound to actin, affected by Ca2+

Sarcoplasmic Reticulum (SR): specialized smooth ER, surrounds each myofibril Stores and releases calcium T Tubule: part of sarcolemma, conducts nerve impulses to every sarcomere Triggers release of calcium from SR

Sliding Filament Model During contractions: thin filaments slide past thick ones so they overlap more

Sliding Filament Model Myosin heads latch onto active sites on actin to form a cross-bridge Attachments made/broken  tiny rachets to propel thin filaments to center of sarcomere