Explain how human activity can affect water availability and quality. (10) Agriculture plays a significant role in the quality of water and three factors come into play when considering agricultural effects: pesticides‚ fertilizers and the waste produced by farm animals. When pesticides or fertilizers are applied to crops the excess materials will either run off the land‚ or seep into the groundwater‚ with an eventual ending in bodies of water such as lakes‚ ponds‚ or streams. The excess nutrients
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The muscle physiology of skeletal muscle was observed by using electrical‚ physical‚ and neural stimulations of an isolated gastrocnemius muscle from Rana pipiens. The gastrocnemius receives signals from the action potentials of the sciatic nerve. The muscle contraction is caused by the binding of a neurotransmitter once the action potential reaches the neuromuscular junction. Stimulation of the muscle and the sciatic nerve allows for recording and measuring of these properties. We observed twitch
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MUSCLE FATIGUE HOW DO MUSCLES GET THE ENERGY TO WORK? In muscles‚ it is essential that Calcium is present‚ as this gives the muscles the ability to contract and relax. For muscles to contract energy is needed: the energy can only be provided by the breakdown of a chemical called adenosine triphosphate (ATP). As ATP is broken down‚ a phosphate molecule is broken off‚ reducing the phosphate molecules‚ from 3 to 2. This produces adenosine triphosphate. However for the muscles contraction to continue
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recessive “mini-muscle” phenotype in mice. Smaller body size and muscles as well as increased maximal oxygen intake are observed in mice with the “mini-muscle” phenotype. This observation raises an issue about why the selectively bred mice with the “mini-muscle” phenotype have reduced triceps and thigh muscle mass as they are able to cover greater distances; due to faster running speed‚ on an activity wheel compared to normal mice. However‚ greater exercise and load is thought to result in muscle hypertrophy
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shouted with those words. Can you imagine what it would be like to hear people talk to you this way every single day? Perhaps‚ we are the once who will say those words one day. Today I would like to talk about ADHD in the scope of how to improve ADHD child’s concentration. Maybe some of you know what is it and maybe some of you are asking yourself‚ " what is that". Now‚ I would like to tell all of you what is ADHD. ADHD is "Attention Deficit Hyperactivity Disorder" that is also known as hyperactive
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Muscles are a Band or bundles of tissue in either the human body ‚ or animal body that allow contraction for movement. There are many muscles in the body. It is stated that there are over 650 muscles in the body ‚ and is said that there are possibilities of up to 840. Your whole body is a muscle. You have Muscles in your head‚ arms‚ legs‚ just about anywhere you can think of and as we progress in life and become of age our muscles may grow and get stronger ‚ or may deteriorate. We can also come across
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Christopher Couchell Muscle Physiology Purpose: The Purpose of this exercise is to understand how muscle twitch‚ contract and react to different activities. Exercise 1: Muscle Twitch A. What is a muscle twitch? A muscle twitch is the fasciculation ‚ or "muscle twitch"‚ is a small‚ local‚ involuntary muscle contraction and relaxation visible under the skin. B. According to the graphs‚ which muscle has the fastest twitch? Why? The lateral rectus eye muscle has the fastest twitch. It
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MUSCLE PHYSIOLOGY Exercise 11 Acuesta‚ Patrisha Afalla‚ Antonette Hanns Beo‚ Jellie Ayz Bustamante‚ Jemimah Keziah Soriano‚ Jhon Cris Introduction • Muscle Contraction - the shortening of the muscle as a result of tension generated by muscle fibers; -Regulated by the production of calcium ions‚ stimulated via thermal‚ chemical‚ mechanical‚ and electrical stimuli Objectives BE ABLE TO: 1. Make a muscle-femur preparation; Set up Kymograph; Demonstrate muscular contraction; Differentiate
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Samantha Hutchins 10/27/15 Vitamin D Deficiency Regarding Muscles Vitamin D deficiency has been tied to mainly bone pathologies. Recent research shows that the effects of Vitamin D span further than just affecting bones and particularly cause muscle weakness. Vitamin D is responsible for aiding in the absorption of other minerals‚ such as calcium. Calcium is a key ligand in muscle contractions‚ thus‚ Vitamin D indirectly can effect muscle contractions. An article published in Nutrition Reviews
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To What Extent does the Sugar Concentration of Water Affects Its Refractive Index? 1. Introduction 1.1 Background Why do object when placed in a bucket of water bend? This is not magic but it is a property of light known as refraction. The bending of light when it travels from one medium to another is known as refraction. Different mediums have different densities and density is defined as the amount of mass per unit volume. The higher the density‚ the higher is the
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