Bio 449Lecture 15 - Endocrinology III / Muscle IOct. 4, 2010 Endocrinology III Hypothalamic-pituitary system (cont'd) Hormonal control of growth (conclusion)

Slides:



Advertisements
Similar presentations
11.2 Muscles and Movement.
Advertisements

Muscular System Chapter 8.
Muscle Physiology Chapter 1.
Fig Myofibrils are surrounded by calcium- containing sarcoplasmic reticulum.
Muscle Function.
MUSCULAR SYSTEM. Types of muscles SkeletalCardiacSmooth.
Skeletal Muscle Contraction
Chapter 24 …. a little anatomy and physiology. Levels of organization in the vertebrate body.
Muscles n Skeletal muscle organization and how it contracts.
Chapter 9 Muscular System
Muscular System Functions
Muscle Physiology Dr Taha Sadig Ahmed 5/13/20151.
Anatomy and Physiology I
MUSCLE TISSUE.
Chapter 12a Muscles.
Muscle Fibers. Muscle fiber is the muscle cell Each skeletal muscle contains hundreds to thousands of these fiber cells.
09_10 Sliding filament theory Slide number: 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Tropomyosin.
Muscular & Skeletal Systems. Figure 30.8_1 Muscle Several muscle fibers Single muscle fiber (cell)
Ch. 11 pg 290. The movement in humans involves bones, ligaments, muscles, tendons and nerves.
Myofibrils are surrounded by calcium- containing sarcoplasmic reticulum.
Muscle Structure and Function
Topic 11: Human Health and Physiology
OBJECTIVES At the end of this lecture the student should be able to: Define different types of muscles Enumerate cellular organization of human skeletal.
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.
Hypothalamus and pituitary Fig Posterior pituitary Fig.7-12 HYPOTHALAMUS Vein POSTERIOR PITUITARY.
Muscles & Skeleton Locomotion Chapter 50. Muscle structure  Muscle fibers  Single cell with many nuclei  Each fiber has a bundle of myofibrils  Each.
The Muscular System Skeletal muscle consists of numerous muscle cells called Muscle fibers. Muscle fiber terminology and characteristics Sarcolemma = plasma.
Cardiac Muscle Involuntary –heart only Contracts & relaxes continuously throughout life –Contracts without nervous stimulation! –A piece of cardiac muscle.
Muscular System Animal movement is based on contraction of muscles working against part of the skeleton.
Lecture # 17: Muscular Tissue
Neuromuscular junction Fig Somatic motor neuron Muscle fiber The neuromuscular junction Motor end plate Terminal bouton Mitochondria Synaptic vesicle.
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,
CHAPTER EIGHT MUSCULAR SYSTEM.
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Fundamentals of Anatomy & Physiology SIXTH EDITION Frederic H. Martini PowerPoint.
Bio 449Lecture 16 - Muscle IIOct. 6, 2010 Excitation-contraction coupling Excitation Contraction Tropomyosin and troponin Cross-bridge cycling Mechanics.
By: Rodrigo Vilaro, Peyton Maclay, and Maria Walts Chapter 49 Motor Mechanisms By: Rodrigo Vilaro, Maria Walts, and Peyton Maclay.
Module 11: Human Health and Physiology II 11.2 Muscles and Movement.
David Sadava H. Craig Heller Gordon H. Orians William K. Purves David M. Hillis Biologia.blu C – Il corpo umano Musculoskeletal System.
Chapter 38: Protection, Support, Movement: Skin, Skeleton, and Muscle.
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–
Figure Ball-and-socket joint Head of humerus Scapula Hinge joint Humerus Ulna Radius Pivot joint.
II. Skeletal Muscle Overview A. Skeletal Muscle Distinguishing Characteristics Striated Voluntary Multi-nucleated B. Functions Movement Maintain Posture.
Muscle Tissue Specialized for contraction Elongated cells
Muscles & Motor Locomotion Why Do We Need All That ATP?
Three types of muscle Skeletal – attached to bone
Topic 11.2 Movement Bone and Muscle. Bones Bones and muscles work together to move the body – Bone and exoskeleton provide framework PartFunction BonesSupport.
Outline I. Types of Muscle II. Anatomy of Skeletal Muscle III. Sliding Filament Theory IV. Role of Ca+ in regulating muscle contraction.
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.
Chapter 9 Muscular System.
The Muscular System. The characteristics of muscle tissue enable it to perform some important functions, including:  Movement – both voluntary & involuntary.
Muscle Contraction. 1.Acetylcholine (Ach) is released from the axon terminal (nerve) into the synaptic cleft and binds to Ach receptors in the sarcolemma.
Muscle voluntary, striated involuntary, striated auto-rhythmic involuntary, non-striated evolved first multi-nucleated digestive system arteries, veins.
WARM UP 1.List 10 locations in the body you can find muscle.
MUSCULAR SYSTEM Part 3: Muscle Structure & Contraction.
How do muscle cells contract ?. What is the structure of a muscle fiber ? The sarcolemma, or plasma membrane contains invaginations called T (transverse)
Muscle Structure & Contraction AIM To understand the structure and histology of muscle and the sliding filament theory of muscle contraction.
MUSCLES LECTURE 14 CHAPTER 12 MECHANISMS OF CONTRACTION.
Unit 11: Human Health and Physiology Lesson 11.2 Muscles and Movement Text Correlation: 11.3/11.4/11.5.
Muscle Contraction.
A skeletal muscle is composed of a variety of tissues
Topic 11.2 Movement Bone and Muscle.
Muscles and Movement.
Chapter 3 Support and locomotion – muscles and movement.
11.2 Muscles and Movement.
LECTURE 3: Muscular System
Muscle Contraction and Movement
Presentation transcript:

Bio 449Lecture 15 - Endocrinology III / Muscle IOct. 4, 2010 Endocrinology III Hypothalamic-pituitary system (cont'd) Hormonal control of growth (conclusion) Temporal patterns of GH release Hypo- and hypersecretion Muscle I Functions and types of muscle Structure of skeletal muscle Myofiber structure Sarcomere structure Contraction of the sarcomere Cross-bridge cycling Length-tension relationship Terms to Know Anabolism IGF-I Osteoblast Osteoclast Chondrocyte Epiphyseal plate Gigantism Acromegaly Dwarfism Smooth muscle Striated muscle Skeletal muscle Cardiac muscle Muscle Tendon Readings Lectures 15-16:Chapter 11, pages Chapter 12 Muscle fiber (myofiber) Sarcolemma Mitochondria Sarcoplasmic reticulum Myofibril Sarcomere Thick filament Thin filament Z-disc (or Z-line) Actin Myosin Cross-bridge Contraction Sliding-filament theory

Hypothalamic-pituitary system Hormonal control of growth

Bone growth Fig Epiphysis Diaphysis Epiphyseal plate Diaphysis Compact bone Osteoblast Chondrocyte Cartilage Bone growth Newly calcified bone Direction of growth Osteoblasts Old chondrocytes Chondrocytes Dividing chondrocytes

Acromegaly Fig

Poodles!

Muscle Physiology Functions and Types of Muscles

Functions of muscle Fig Flexion Extension Biceps muscle contracts (flexor) Triceps muscle relaxes Triceps muscle contracts (extensor) Biceps muscle relaxes

Functions of muscle Fig Peristalsis Vasoconstriction Hydrostatic Pressure

Types of muscle Fig Nucleus Muscle fiber (cell) Striations Skeletal muscle

Types of muscle Fig Muscle fiber Nucleus Striations Cardiac muscle Intercalated disk

Types of muscle Fig Muscle fiber Nucleus Smooth muscle

Muscle structure Fig Skeletal muscle Muscle fascicle: bundle of fibers Muscle fiber Connective tissue Tendon Nerve and blood vessels Nucleus

Muscle structure Fig T-tubules Sarcoplasmic reticulum Sarcolemma Mitochondria Myofibril Thick filament Thin filament Nucleus ULTRASTRUCTURE OF MUSCLE

Muscle structure Myofibril Z disk Sarcomere Thin filaments Tropomyosin Troponin Actin chain G-actin molecule Myosin tail Myosin heads Myosin molecule Thick filaments Hinge region Titin M line Myosin crossbridges M line Fig. 12-3

Cross-bridge cycle Fig ADP Actin moves Cytosolic Ca 2+ Tropomyosin shifts, exposing binding site on actin TN Power stroke Initiation of contraction Troponin G-Actin Tropomyosin blocks binding site on actin Myosin head TN Relaxed state. Myosin head cocked. Pi

Sarcomere contraction Fig. 12-8

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

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