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Chapter 10 Muscles
Functions of Muscles Body movements Body positions Storing and moving substances Generating heat
Outside to Inside Fascia Epimysium Perimysium Fascicle Endomysium Muscle Fiber Myofibril
Components of a Myofiber (Muscle Cell) Sarcolemma Sarcoplasm Myoglobin T tubules Multiple nuclei Multiple mitochondria Myofibrils
Components of a Myofibril Z disc (line) = actin attachment M line = myosin attachment A Band = overlap of actin and myosin I Band = actin fibers Actin = thin Myosin = thick
Sequence of a Contraction Actin and Myosin Interact Z to Z lines move closer together Sarcomere gets smaller Group of sarcomeres contract Myofibril contracts Muscle cell contracts Fascicle contracts Muscle contracts
Sequence of Neurological Events Neuron stimulates muscle fiber Release of Acetylcholine Release of Calcium Calcium binds to troponin and removes it Actin and Myosin react ATP used
Sequence for Muscle Metabolism Use available ATP Use Creatine Phosphate Break down glucose Take 2 pyruvic acids to Kreb’s Cycle Take coenzymes to electron transport chain
Summary Glucose + ADP + P + Oxygen = ATP (32+) + carbon dioxide + water + heat
Smooth Muscle Fiber Contraction
Types of Fibers Slow Oxidative Fibers –Dark red –Large amounts of myoglobin and mitochondria –Aerobic respiration Fast Glycolytic Fibers –Low myoglobin content –Few mitochondria –Anaerobic movement
Terms to Know Atrophy Hypertrophy Oxygen debt Muscle fatigue Muscle tone Flaccid Rigidity
More Terms Myopathy Muscular dystrophy Spasm, cramp, tic, tremor, and fibrillation Hypertonia Hypotonia Muscle strain Myalgia Isotonic Isometric
UNIT 7: MUSCULAR SYSTEM Chapter 9. GENERAL OVERVIEW: STRUCTURE –Hierarchy of skeletal muscles: muscle, fascicles, fibers, myofibrils, myofilaments –Coverings.
fiber Each muscle cell is a fiber Functions of skeletal muscle: ◦ Produce movement ◦ Maintain posture & position ◦ Support tissues ◦ Guard entrances/exits.
The Muscular System. Muscle Tissues Cardiac –Involuntary striated muscle –Found only in heart –Smooth –Lines blood vessels, digestive organs, urinary.
Chapter 9 Muscular System 9-2 Three Types of Muscle Tissues Skeletal Muscle Smooth Muscle Cardiac Muscle.
Chapter 8 Muscular System. Introduction Three types of muscles: – Skeletal – Smooth – Cardiac.
Muscular System Chapter 9. Three types of Muscle Tissue Skeletal Smooth Cardiac.
Functions of skeletal muscles 4 Movement 4 Maintain posture and body position 4 Support soft tissues, ex abdominal wall supports ventral body organs 4.
Notes – Muscle Energy & Disorders. Review Epimysium (outer covering of muscle) Fascicle (bundle of muscle fibers) Perimysium (covering fascicle) Endomysium.
Human Anatomy and Physiology Chapter 9 Muscular System 9-1.
Chapter 9 - Muscles and Muscle Tissue $100 $200 $300 $400 $500 $100$100$100 $200 $300 $400 $500 Skeletal Muscle Anatomy The Sliding Filament Theory Muscle.
Unit 4 Muscular System 1. A. All movements require muscle which are organs using chemical energy to contract. B.The three types of muscle in the body:
© 2012 Pearson Education, Inc. PowerPoint ® Lecture Slides Prepared by Patty Bostwick-Taylor, Florence-Darlington Technical College C H A P T E R 6 The.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings The Muscular System Produce movement or tension via shortening (contraction)
Muscle Tissue Chapter 10. Muscle Tissue Muscle is one of the 4 primary types of tissue. It is subdivided into skeletal, cardiac and smooth muscle.
The Muscular System. Characteristics of Muscle Tissue Contractility- the ability to shorten and thicken Excitability – ability of muscle tissue to receive.
Muscular System Overview. Types of Muscle ● Skeletal – striated & voluntary ● Smooth – non-striated & involuntary ● Cardiac – striated & involuntary.
Muscle MCQs. The fibrous connective tissue sheath which encloses a whole muscle is called the endomysium. perimysium. epimysium. sarcolemma.
The Muscular System. Muscle Tissues Cardiac –Involuntary striated muscle –Found only in heart –Natural contraction cycle determined by pacemaker cells.
Muscular System. Types of Muscle ● Skeletal – ● Smooth – ● Cardiac - The word “striated” means striped. Skeletal muscle appears striped under a microscope.
Muscular System. Types of Muscle ● Skeletal – striated & voluntary ● Smooth – involuntary ● Cardiac - heart The word “striated” means striped. Skeletal.
Functions of Muscles 1. Produce movement – all movements of the human body are produced by muscles 2. Maintain posture – some muscles are in a partial.
$100 $200 $300 $ $200 $300 $400 $500 StructureMic Anat Name That Muscle This and that Contraction. Muscular System Jeopardy $100 Muscle Movement.
Muscular System. Types of Muscle ● Skeletal – striated & voluntary ● Smooth – involuntary ● Cardiac - heart The word “striated” means striped.
Muscular System adapted from
1. – Name this protein. actin H Band 2. Name this specific band.
3 Types of Muscles Smooth Cardiac Skeletal Smooth Muscle No striations Single nucleus No/underdeveloped transverse tubules Involuntary Contracts in.
THE MUSCULAR SYSTEM. FUNCTIONS OF MUSCLE PRODUCING MOVEMENT – BOTH INTERNAL AND WHOLE – BODY MAINTAINING POSTURE STABILIZING JOINTS GENERATING HEAT.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Objective 3 Describe and diagram the microscopic structure of skeletal muscle.
STRIATED SKELETAL MUSCULAR TISSUE. FUNCTIONS Movement Heat Stabilization.
Muscle Physiology Chapter 11. Connective Tissue Components Muscle cell = muscle fiber Endomysium – covers muscle fiber Perimysium – binds groups of muscle.
THE MUSCULAR SYSTEM To understand the structure of muscle. To explain the components and significance of the sarcomere. To identify the parts of.
Muscular System. Types of Muscle Skeletal – striated & voluntary Smooth – involuntary Cardiac - heart.
Ch 9 Muscular System. Types of Muscle Skeletal – striated & voluntary Smooth – involuntary, digestive organs/ uterus, not striated Cardiac – involuntary,
Skeletal Skeletal – striated, multinucleate, voluntary, m Smooth Smooth - found in walls of hollow visceral organs; ex. stomach, bladder, respiratory.
Muscle Review. 1) Skeletal muscle is described by all of the following EXCEPT: a) striated b) voluntary c) multinucleate d) autorhythmic.
Skeletal Muscle Tissue. Skeletal Muscle Tissue Arrangement Myofibrils – contractile elements of muscle tissue.
Muscle Notes 2. Anatomy of a Muscle Cell Muscles and Muscle Fiber Structure Muscles are composed of many fibers that are arranged in bundles called.
Chapter 8-Muscular System. Case Study # 1 Signs and Symptoms: -Respiratory Acidosis -Accelerated oxygen consumption -Extreme heat production Case Study.
Muscle Structure Review & Physiology Adopted from Marieb’s A & P.
produce movement maintain posture stabilize joints generate heat move substances within the body Muscle Function.
Muscular System. Muscular System Functions: 1. produce movement 2. Maintain posture 3. Stabilize joints 4. Generate heat 5. Move substances (fluid, food.
Chapter 9 Muscular System. Functions of a Muscle Tissue 1.Movement: 1.Skeletal 1.Skeletal - locomotion, vision, facial expression. 2.Cardiac 2.Cardiac.
Smooth - no striations, involuntary visceral organs Skeletal - striated, voluntary, tires easily, powerful Cardiac - striated, involuntary intercalated.
Skeletal Muscle Unit Chapter 6. Functions of skeletal muscles Produce skeletal movement Maintain posture and body position Support soft tissues.
Histology of Muscle. Skeletal Muscle Tissue Muscle Histology Elongated cylindrical cells = muscle fibers Plasma membrane = sarcolemma Transverse (T)
Muscular System The 3 Types of Muscles SKELETAL MUSCLE STRUCTURE.
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