and females. Men have more lean muscle mass and respiration occurs at the cellular level of the mitochondria in the muscle‚ so the more mitochondria means the body can be in a longer state of aerobic respiration (Bonen & Shaw 2008). 2b) V02 max decrease is accompanied by the loss of lean muscle tissue as one ages. According to a study by Betik and Hepple (1988)‚ the reduced rate of muscle oxygen delivery caused by a lowered cardiac output‚ reduced skeletal muscle oxidative capacity and mitochondrial
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stomach has three layers of non-striated muscle in its wall and an inner lining of columnar epithelium with goblet cells. The tissue connecting the lining with the muscular coat is areolar tissue. Non striated muscle is a type of muscle tissue‚ which is also called involuntary‚ smooth or plain muscle. It still contains the protein filaments; they do not lie in an ordered pattern and therefore do not produce the banding characteristics of striated muscle. The muscle fibres are spindle or cigar shaped
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Lab 2 – Skeletal Muscle 1. Describe basic setup a. What was manipulated? Intensity‚ frequency b. What was measured? Twitch tensions c. What concepts were investigated? i. Frog‚ sciatic nerve‚ gastroc‚ d. What was investigated? i. Effects of stimulus frequency and intensity on contraction-the more intensity‚ the higher the twitch tension. The more freq- the more twitch tension (By ~4.0pps we start to see summation of the twitches and by ~15pps we see no single twitches because the muscle has reached
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for the production of ATP. Adenosine triphosphate (ATP) is the immediately usable form of chemical energy use for muscular activity. It is stored in most cells‚ especially muscle cells. Other forms of chemical energy‚ such as that available from foods we eat must be transforming into ATP before they can be utilized by muscle cells . Human body cells generated ATP by three methods which are: I. ATP-PC system II. Glycolytic system III. Oxidative system ATP-PC System (Anaerobic ATP
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multiple proteins. Since MFMs show morphologically distinct features but consist of genetically and clinically heterogeneous diseases‚ muscle biopsy is important for the diagnosis. A 20-year-old man complained of progressive weakness and atrophy of both legs for two years. He had a dysmorphic face and short stature. The light microscopic examination of his muscle biopsy showed mixed myopathic and neurogenic changes. Many myofibers with multiple clusters of blue red rod-like structures and cytoplasmic
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the teeth‚ gland‚ horns. II. DERMIS - inner‚ thicker layer of the skin. Made up of mostly connective tissue fibers‚ smooth muscles‚ blood vessels and nerve ending Mesodermal in origin. Dermal derivatives of the skin- scale of fishes‚ antlers‚ dentine‚ and bony plates. Subcutaneous connective tissues- connective tissue that separates the skin from the underlying muscles Chromatophores- specialized connective tissue cells which contain pigments. Types of Chromatophores 1. Melanophores- black
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BIO - PROJECT PLANT TISSUES Two Major Categories of Plant Tissues 1. Meristematic Tissue. A. Apical Meristems B. Lateral Meristems 2. Permanent Tissue A. Dermal (Surface Tissue) B. Fundamental Tissue (Ground Tissue) C. Vascular Tissue MERISTEMATIC TISSUE Composed of immature cells and are regions of active cell division. small‚ thin walls and rich in cytoplasm. Found in the growing tips of the roots and stem. A. Apical Meristems * Responsible for increase in length of
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Your heart speeds up to pump extra food and oxygen to the muscles. Breathing speeds up to get more oxygen and to get rid of more carbon dioxide. When a fit person‚ such as an athlete‚ exercises the pulse rate‚ breathing rate and lactic acid levels rise much less‚ than they do in an unfit person. As the exercise intensity increases so do the heart and respiratory rates to supply oxygen to the working muscles at a faster rate so they can keep up‚ few athletes have perfected this to a point where they
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The Musculoskeletal System The Musculoskeletal System combines the skeletal system and the muscular system. All of the bones‚ cartilage‚ muscles‚ joints‚ tendons and ligaments in a person’s body compose what is known as the musculoskeletal system. The bones provide the body with a framework‚ giving it shape and support; they also serve as protection for internal organs such as the lungs and liver. Muscles are fibres that help to make deliberate movement of a body part or involuntary movement within
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living a healthy lifestyle and also the childs general well being. short term health- physical activity promotes a lot of different areas‚ some of these being; building muscle- helps children move more freely which makes them really enjoy physical play. developing heart and lung functions developing a skeletal frame- if a skeletal frame is not developed properly it cause be a risk of many health problems. long term health- physical activity is very important and also plays a very big role in preventing
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