PPT-Muscles II: Microscopic Anatomy and Contraction

October 24 25 2017 Muscle Structure Muscle Fascicle bundle of fibers Muscle Fiber single cell Myofibril organelle Sarcomere unit of contraction Microscopic Anatomy of Skeletal Muscle. Learning Objective:. To . be able to explain the sliding filament theory using appropriate terminology.. Structure of a Muscle. Skeletal muscle is made up of bundles of muscle . fibres. .. Fibres. are bound together by connective tissue through which run blood vessels and nerves.. Review Principles of Muscle Mechanics. Same principles apply to contraction of a single fiber and a whole muscle. Contraction produces tension, the force exerted on the load or object to be moved. Review Principles of Muscle Mechanics. Interesting Muscle Facts. Thirty facial muscles create looks like surprise, happiness, sadness, and frowning. Eye muscles are the busiest muscles in the body. Scientists estimate they may move more than 100,000 times a day. . Contraction of Skeletal Muscle. . (fasicle). A. Muscle . Fiber. 1. . sarcolemma. . * muscle cell membrane . . * extends into muscle fiber (forms . T-tubules. ) . 2. . sarcoplasmic reticulum. Types of Muscle Tissue . (cont.). Muscle Group. Major Location. Major . Function. Mode of Control. Skeletal Muscle. Attached to bones and skin of the face. Produces body movements and facial expressions. I. Functions of Muscular Tissue. Like nervous tissue, muscles are excitable or "irritable”. they have the ability to respond to a stimulus. Unlike nerves, however, muscles are also:. Contractible. . Muscular System. Part 1. Muscular Tissue . 3 types:. Skeletal. striated & voluntary. Cardiac. striated & involuntary. Smooth . Smooth & involuntary. Types of Muscle Tissue. most attached to bone. perfomance. enhancing drugs?. 2. Would . you consider supplements such as . Creatine. to be a performance enhancing drug? Why or why not?. The Muscular System. A&P Fall 2016. I. Overview of Muscle Tissues. Muscle Contraction and the Sliding Filament Theory Learning Objective: To be able to explain the sliding filament theory using key terminology. Structure of a Muscle Skeletal muscle is made up of bundles of muscle Same principles apply to contraction of a single fiber and a whole muscle. Contraction produces tension, the force exerted on the load or object to be moved. Review Principles of Muscle Mechanics. Contraction does not always shorten a muscle:. Produce movement. Maintain posture. Stabilize joints. Generate heat. The Muscular System. Muscles are responsible for all types of body movement. Three basic muscle types are found in the body. Skeletal muscle. The Muscular System. Muscles are responsible for all types of body movement. Three basic muscle types are found in the body. Skeletal muscle. Cardiac muscle. Smooth muscle. Characteristics of Muscles. Chapter . 4 SEHS. Muscle Tissue. Lecture Outline. Principles of Human Anatomy and Physiology, 11e. 3. INTRODUCTION. Motion results from alternating contraction (shortening) and relaxation of muscles; the skeletal system provides leverage and a supportive framework for this movement.. Muscle Facts 1. Smallest muscle in the body?. Stapedius. : the muscle that activates the stirrup, the small bone that sends vibrations from the eardrum to the inner ear. It measures just 0.05 inch (0.13 centimeter) in length..