Muscle Description Muscles of the Head: Facial Expression Origin Insertion Action bipartite muscle‚ Epicranius:includes frontalis connected by galea & occipitalis aponeurotica covers forehead‚ no bony attachments galea aponeurotica skin of eyebrows and root of raises eyebrows (as in surprise); nose wrinkles forehead skin horizontally Occipitalis back of head occipital and temporal bones galea aponeurotica pulls scalp posteriorly Corrugator supercilii
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The atria receive blood returning to the heart from the body and the ventricles pump blood from the heart to the body. Valves allow blood to flow in one direction between the chambers of the heart. The Heart Wall The heart is composed of cardiac muscle which enable the heart to contract and allow the synchronization of the heart beat. The heart wall is divided into three layers: the epicardium‚ myocardium‚ and endocardium. * Epicardium - outer protective layer of the heart. * Myocardium
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triphosphate (ATP) molecule. Nerve impulses are sent from the motor cortex of the brain through the spinal cord. The musculocutaneous nerve continues the wave of axon depolarization to individual muscle fibers via motor units. Each motor unit has so many number of motor nerves that extend to individual muscle fibers by way of a neuromuscular junction called the synapse. When the motor nerve is depolarized‚ acetylcholine is released from the axon terminals at the neuromuscular junction. . The acetylcholine
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Chapter 9: Muscles and Muscle Tissue‚ Lecture Outline: I. Overview of Muscle Tissues (pp. 276–278; Table 9.1) A. Types of Muscle Tissue (p. 277; Table 9.1) 1. Skeletal muscle is associated with the bony skeleton and consists of large cells that bear striations and are under voluntary control. 2. Cardiac muscle occurs only in the heart and consists of small cells that are striated and under involuntary control. 3. Smooth muscle is found in the walls of hollow organs and
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Introduction “Eat That Frog!: 21 Great Ways to Stop Procrastinating and Get More Done in Less Time” by Brian Tracy‚ is the book I want to recommend‚ which provides 21 effective methods of conquering procrastination and accomplishing more. The reason why I choose this book is that I always want to improve my productivity. This book teaches methods in-depth details how to improve people’s efficiency in order to achieve their goals. I would first give a brief summary of the concepts and ideas brought
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There are many different muscles groups that are used during exercise. Some of the main muscle groups are hamstrings‚ quads‚ glutes‚ and pectoral muscles. There are different muscle within each muscle group. In the hamstring muscles‚ there are three main muscles: semitendinosus‚ semimembranosus‚ and biceps femoris. In the quad muscles there are four main muscles: rectus femoris‚ vastus lateralis‚ vastus intermedius‚ and vastus medialis. There are three main muscles in the glutes: gluteus maximus
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Cardiac This is an involuntary muscle‚ found solely in the walls of the heart‚ as well as in the walls of the blood vessels. This sort of muscle has similarities with the skeletal muscles‚ because it is striated. Furthermore‚ it has slight similarities to the smooth muscles‚ because its contractions are not under conscious control. On the other hand this type of muscle is highly specialised. It is under the control of the autonomic nervous system‚ however‚ even without nervous imput contractions
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Muscle Test #1 Study Guide 1. What are the primary functions of muscles? What are skeletal muscles made of? Five Skeletal Muscle Functions 1.Produce movement of the skeleton •By pulling on tendons that then move bones 2.Maintain posture and body position 3.Support soft tissues •With the muscles of the abdominal wall and the pelvic floor 4.Guard entrances and exits •In the form of sphincters 5.Maintain body temperature •When contraction occurs‚ energy is used and converted to heat
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We have more than 600 muscles in our bodies. They pump blood throughout your body‚ and help you lift heavy things like backpacks‚ and textbooks. You could control some of your muscles‚ while others like your heart‚ have their own jobs without us thinking at all. Muscles are all made up of same material. A type of tissue like the material in a rubber band. Thousands or tens of thousands of small fibers make up all or each muscle in our body. There are different muscles‚ fibers‚ and contractions.
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States of Muscle Dystrophy and relation to Dystrophin Muscle dystrophy branches into many different kinds of muscle disease including myositis‚ multiple sclerosis and fibromyalgia. What makes it so important is that muscle dystrophy can be found in patients as young as infants and as old as adults. Also‚ some types of muscle dystrophy can be progressively disabling. Muscle diseases are present in infants and children because many of the diseases are hereditary. For example‚ Duchenne muscular dystrophy
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