Structure of Muscle. Sliding Filament Hypothesis n During Contraction n Proteins DO NOT actually shorten n Rather they slide past one another n Support.

Slides:



Advertisements
Similar presentations
Muscle Specialized for: Types:.
Advertisements

Neuromuscular Junction
Muscle Physiology Chapter 1.
Fig Myofibrils are surrounded by calcium- containing sarcoplasmic reticulum.
Sliding Filament Theory How do muscles work…... Muscle Cell Structure n Muscles are broken into smaller muscle fibers n muscle fibers are broken into.
CONTRACTION OF SKELETLAL MUSCLE: SLIDING FILAMENT THEORY
The Steps of Muscle Contraction: The Sliding Filament Theory
Muscles n Skeletal muscle organization and how it contracts.
Function depends on structure
Figure  _________ and_______filaments slide over each other______________the muscle length  Always requires ________ ions and ___.
Myosin Contracts Skeletal Muscle Jonathan P. Davis, Ph.D. Assistant Professor Office/Lab Phone Department of Physiology.
09_10 Sliding filament theory Slide number: 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Tropomyosin.
Skeletal Muscle Physiology cont. Diagram the chemical and mechanical steps in the cross-bridge cycle and explain the effect on the muscle fiber length.
Motor mechanisms. Keywords (reading p ) Bundle, fiber, myofibril, sarcomere Z-line, thick filament, thin filament Actin, myosin, sliding filament.
Myofibrils are surrounded by calcium- containing sarcoplasmic reticulum.
Sliding Filament Theory
Myosin Myosin is a protein molecule found in the thick filaments. Myosin is a protein molecule found in the thick filaments.
Muscle Excitation – Contraction Coupling Chapter 16 KINE 3301 Biomechanics of Human Movement.
7.2 Microscopic Anatomy and Contraction of Skeletal Muscle
 Name the following movements: ◦ Increasing angle of joint (ex. Straightening arm) ◦ Moving around longitudinal axis: ◦ Moving a limb away from midline.
MUSCLE CONTRACTION. Microscopic Anatomy of Skeletal Muscle Sarcomere Contractile unit of a muscle fiber Figure 6.3b.
Muscle Cells & Muscle Fiber Contractions
Muscles & Skeleton Locomotion Chapter 50. Muscle structure  Muscle fibers  Single cell with many nuclei  Each fiber has a bundle of myofibrils  Each.
Cardiac Muscle Involuntary –heart only Contracts & relaxes continuously throughout life –Contracts without nervous stimulation! –A piece of cardiac muscle.
PHYSIOLOGY 1 LECTURE 17 SKELETAL MUSCLE FIBER ANATOMY.
Hair cells, actin bundles, and unconventional myosins.
IN CLASS NOTES = STEPS OF A MUSCLE CONTRACTION. STEP 1 Calcium ions present Ca+ binds to troponin which makes tropomyosin move out of way for myosin head.
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.
Motor mechanisms.
20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt Muscle.
Interaction of thick & thin filaments __________________ –_____________________________________ _____________________________________ –_____________________________________.
Figure Ball-and-socket joint Head of humerus Scapula Hinge joint Humerus Ulna Radius Pivot joint.
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.
Muscle Physiology Dynamics of Muscle Contraction MMHS Anatomy.
The Sliding Filament Theory
Physiology of Skeletal Muscle Contraction. The Muscle Action Potential ( AP ) The Muscle Action Potential ( AP ) Muscle RMP = -90 mV ( same as in nerves.
The Physiology of Skeletal Muscle Contraction
Figure 10.6 Levels of Functional Organization in Skeletal Muscle Fiber
Lecture #21 Date ____ n Chapter 49 ~ Sensory and Motor Mechanisms.
Molecular Basis of Muscle Contraction Mercedita Macalintal, MD, DPPS.
Molecular Basis of Muscle Contraction Standard 9 h. Students know the cellular and molecular basis of muscle ocntraction,including the roles of actin,
FROM EXCITATION TO CONTRACTION. NEUROMUSCULAR JUNCTION.
The Muscular System. Review of Muscle Types Characteristics Excitability Contractibility Extensibility Elasticity.
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.
Regulation of Contraction I. How do nerves stimulate muscle contraction? II. Factors influencing muscle tension III. How does contraction of smooth/cardiac.
Sarcomere Physiology: Sliding Filament Theory This is pretty exciting!
Muscle Contraction.
Skeletal Muscle Lab. Three Muscle Types Parts of the Muscle Fiber.
MUSCLES LECTURE 14 CHAPTER 12 MECHANISMS OF CONTRACTION.
HOW DO MUSCLES CONTRACT?
Muscle Fiber Contraction
Muscle contraction.
Muscle Physiology ..
Sliding Filament Theory
Molecular mechanism of muscle contraction
The Structure of Skeletal Muscle
Comparative Vertebrate Physiology
EXCITATION CONTRACTION COUPLING
Muscle Contraction.
The Anatomy of Skeletal Muscle
A1.
Applied Exercise Physiology
Muscle and Muscle Contraction
Motor mechanisms II.
Excitation-Contraction Coupling 1. Impulse arrives from motor neuron 2. Neuron releases acetylcholine (Ach) into synapse with muscle 3.
Skeletal muscle contraction
Contraction II Department of Biology, WCU.
Muscles & Motion.
Presentation transcript:

Structure of Muscle

Sliding Filament Hypothesis n During Contraction n Proteins DO NOT actually shorten n Rather they slide past one another n Support n Changes in Sarcomere Bands n Actual measurement of proteins n Length-Tension Characteristics

Sliding Filament Hypothesis n During Contraction n Proteins DO NOT actually shorten n Rather they slide past one another n Support n Changes in Sarcomere Bands n Actual measurement of proteins n Length-Tension Characteristics

Length - Tension Characteristics n Stretch Muscle to Various Lengths n Measure Active Tension Sarcomere Length Tension

Troponin - Tropomyosin Complex Myosin Head Myosin Binding Site Actin Tropomyosin Filament T C I Ca Binding Sites

Troponin - Tropomyosin Complex Myosin Head Myosin Binding Site Actin T C I Ca

Troponin - Tropomyosin Complex Myosin Head Myosin Binding Site Actin T C I Ca

Troponin - Tropomyosin Complex Myosin Head Myosin Binding Site Actin T C I Ca

Plunger Model for Release of Ca ++ from SR Ca Ca Ca ATP Ca Dihydropyridine Receptor Ryanodine Receptor

Summary of Excitation-Contraction Coupling Ca

Muscle Mechanics – Series Elastic Component (SEC)

Variation in Muscle Tension

Muscle Fiber Types Type I Type IIa Type IIb

Braided Pneumatic Actuator

Colburn Test Rig

Length – Tension Characteristics

Festo Actuators

Air Insect - Kirchner

Buckling

Mini-Braided Pneumatics: Matt Birch and Alan Pollack

Electroactive Polymer – SRI et al

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

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