Brian Howey is a conformist.. I. Skin A.Anatomy 1. 3 Layers: Epidermis, Dermis and Subcutaneous/Hypodermis (not part of skin). 2. Melanocytes: Cells within.

Slides:

Advertisements

Similar presentations

Muscular System.

Advertisements

Skeletal, Muscular, and Integumentary Systems

Physiology of Muscles The Sliding Filament Theory

Skeletal Muscle Contraction

Chapter 8 Muscular System. Introduction Three types of muscles: – Skeletal – Smooth – Cardiac.

Chapter 24 …. a little anatomy and physiology. Levels of organization in the vertebrate body.

Muscles n Skeletal muscle organization and how it contracts.

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

Muscle Physiology Human Anatomy and Physiology.  Beneath the sarcolemma of a muscle fiber lies the sarcoplasmic reticulum (endoplasmic reticulum), which.

Objective 3 Describe and diagram the microscopic structure of skeletal muscle fibers.

Histology of Muscle.

Muscular & Skeletal Systems. Figure 30.8_1 Muscle Several muscle fibers Single muscle fiber (cell)

Sliding Filament Theory

Topic 11: Human Health and Physiology

The Muscular System What do skeletal muscles do? How do muscles work?

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.

INTRODUCTION TO BODY STRUCTURE. BODY ORGANIZATION 1. The levels of organization of the body: cells- individual unit tissues- Similar cells that work together.

Muscle Cells & Muscle Fiber Contractions

Unit 5 Day 1 Anatomy To understand is to forgive, even oneself. Alexander Chase.

11.2.Muscles and movement. State the roles of bones, ligaments, muscles, tendons and nerves in human movement. Label a diagram of the human elbow joint,

Muscle Notes 2.

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

Chapter 38: Protection, Support, Movement: Skin, Skeleton, and Muscle.

Ch : Contraction and Metabolism of Skeletal Muscle

Interaction of thick & thin filaments __________________ –_____________________________________ _____________________________________ –_____________________________________.

____ Chapter 49 ~ Sensory and Motor Mechanisms ( Just focusing on motor mechanisms ) Motor Mechanisms.

Sliding Filament.

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

Musculoskeletal System

Outline I. Types of Muscle II. Anatomy of Skeletal Muscle III. Sliding Filament Theory IV. Role of Ca+ in regulating muscle contraction.

Neuromuscular Junction and Major Events of Muscle Contraction Quiz Review.

Lecture #21 Date ____ n Chapter 49 ~ Sensory and Motor Mechanisms.

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

Skeletal Muscle Contraction Notes. Review Epimysium (outer covering of muscle) Fascicle (bundle of muscle fibers) Perimysium (covering fascicle) Endomysium.

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

The Muscular System and Integumentary System Ms. Hoffman September 13, 2004.

Muscular System Chapter 9. Three types of Muscle Tissue  Skeletal  Smooth  Cardiac.

The Muscular System What do skeletal muscles do? How do muscles work?

Muscle System. Root Words 3 Kinds of Muscle Skeletal Smooth (stomach, intestine) Cardiac.

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

Chapter 38, (page ) Locomotion Skeleton + Muscles Csaba Bödör,

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

The Muscular System What do skeletal muscles do? How do muscles work?

Movement Chapter 30.

Muscle Tissue Sarcomere Muscle Contraction Energy & Muscle Misc. 100

The Physiology of Muscle Contractions

EQ: How do our muscles in our body contract?

Muscular System Notes Unit 6.

The Muscular System What do skeletal muscles do? How do muscles work?

The Muscular and Skeletal Systems

A skeletal muscle is composed of a variety of tissues

Introduction The Muscular System.

Introduction The Muscular System.

Muscle anatomy and Energy

Muscle Contraction.

Anatomy & Physiology Ms. Cohen

LECTURE 14 CHAPTER 12 MECHANISMS OF CONTRACTION AND NEURAL CONTROL

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

THE MUSCLE CELL.

Muscle Contraction and the Sliding Filament Theory

Muscle Contraction

Muscles & Motion.

Chapter 49 –Sensory and Motor Mechanisms

Muscle Contraction

Review: Fig. 7.1.

Skeletal Muscle Fibers

6 The Muscular System 1.

Presentation transcript:

Brian Howey is a conformist.

I. Skin A.Anatomy 1. 3 Layers: Epidermis, Dermis and Subcutaneous/Hypodermis (not part of skin). 2. Melanocytes: Cells within the dermis that produce melanin. 3. Keratinocytes: Cells within the dermis that produce keratin, the major protein in skin

I. Skin B. Physiology 1. Makes vitamin D 2. Protection: Strong due to collogen component. 3. Temperature Regulation

II. Bone A.Osteocytes: Bone cells 1. Osteoblasts: Build Bone Tissue 2. Osteoclasts: Dissolve Bone Tissue B. Osteon: Functional Unit of Bone Building.

II. Bone C. Anatomy: Compact bone, Spongy bone, Yellow Marrow, Red Marrow 1. Compact: Lacks air spaces 2. Spongy: Interlaced with air spaces 3. Yellow Marrow: Stores fat 4. Red Marrow: Produces blood cells.

III. Muscle Contraction A.Sarcomere: Functional unit of muscle contraction. 1. Actin – Thin protein filaments 2. Myosin - Thicker protein filament

Fig c, p. 658 one actin molecule part of a thin filament Arrangement of actin molecules in the thin filaments of a sarcomere parts of myosin molecule part of a thick filament Arrangement of myosin molecules in the thick filaments of a sarcomere

Muscle Contraction B. Sliding Filament Theory: The myosin proteins slide past the actin filaments. Pulls Z-bands closer together.

Fig , p. 659 Cross-bridge forms between an actin and a myosin filament Actin filament slides past myosin filament, toward sarcomere’s center, in a power stroke The cross bridge is broken Another cross- bridge forms between same filaments Another power stroke slides actin filament closer to the center of sarcomere between contractions actinmyosinactin same sarcomere contracted

IV. Signaling Muscle Contraction A.Motor neurons stimulate release of calcium for muscle contraction. B.Calcium provided by Sarcoplasmic Reticulum.

C. Acetylcholine is neurotransmitter that communicates with muscle.

Fig , p. 660,61 section from spinal chord motor neuron Signal from the neuron system travel along spinal cord, down motor neuron T tubule section from a skeletal muscle Sarcoplasmic reticulum (calcium storage) plasma membrane of skeletal muscle cell Z band one of the myofibrils inside the muscle cell

IV. Fueling Muscle Contraction A. When myosin and actin interact, they need ATP to release. B. Preference for ATP: Creatine Phosphate, Respiration, then Lactic Acid Fermentation