Problem: Does prior exercise affect the ability to squeeze a clothespin? Hypothesis: After exercise‚ people will be able to squeeze the clothespin faster than those without prior exercise. Materials: For this experiment a timer and a clothespin were used. Methods: To begin this experiment an individual was asked to squeeze a clothespin as many times as possible within one minute and the results were recorded. Then this same individual was asked to exercise (run in place‚ preferably)
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Erasistratus’s model of the respiration and blood distribution is considerably more mechanical than Aristotle’s due to the technological advances that were thriving in Alexandria compared to Athens. Both scientists base their models of respiration and blood distribution in the body from technological-ladenness of observation. Erasistratus proposes that heart uses force propulsion to distribute air and blood throughout the arteries and veins. His concept focuses on “the filling towards what is being”
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Theme: Energy Learning Area: 2. Heat Learning Objective: 2.4 Applying the principles of expansion and contraction of matter Learning Outcome: A student is able to: • Apply principle of expansion and contraction of matter in solving simple problems Materials: Activity sheets 1 – 5. (provided to the groups during the previous class)‚mahjong papers and marker pens‚ LCD projector Teacher: Good morning boys and girls. What have you learnt yesterday? Teacher waits and listens to students’
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move through a system of muscles‚ bones‚ tendons‚ cartilage and ligaments. Each past of the system is operated by the nervous system‚ which has its main control center in the brain‚ this creates voluntary movement such as kicking a ball. The body moves through different muscle contractions‚ these contractions are
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Comparing the Cardiac muscle and the Skeletal muscle Differences Similarities Skeletal muscle is usually linked to bones by structures called tendons. Cardiac muscle is found in the heart. They are both important parts to the body. Skeletal muscle cells are usually arranged into cylindrical fibres with multiple nuclei and can be directly controlled by voluntary nerve signals from the nervous system. Cardiac muscle cells are normally shorter and are linked via gap junctions which allow compounds
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Muscular System: Muscle Metabolism 1. List the three roles of ATP in muscle contraction: 1. _Energize the power stroke of the myosin cross bridge. 2. _Disconnecting the myosin head from the binding site on actin at the conclusion of a power stroke. 3. _Energizing the calcium ion pump. 2. The potential energy in ATP is released when the terminal high-energy bond is broken by a process called hydrolysis. Write the end products of this process: ATP (+ H2O) (
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chapter Learning Objectives • Learn how our bodies change the food we eat into ATP to provide our muscles with the energy they need to move • Examine the three metabolic systems that generate ATP 2 Fuel for Exercise : Bioenergetics and Muscle Metabolism Terminology • Substrates – Fuel sources from which we make energy (adenosine triphosphate [ATP]) – Carbohydrate‚ fat‚ protein Measuring Energy Release • Can be calculated from heat produced • 1 calorie (cal) = heat energy required
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KIN 2500 -- MUSCLES O: origin I: insertion A: action N: Lever: rigid structure that moves around a fixed point fulcrum * Effort: causes the movement; force that is due to the muscular contraction; you only get motion when the effort that is applied at the insertion point exceeds the load * Load/Resistance: opposes that movement * 1st class levers: not very common; fulcrum is fixed between effort and load * 2nd class levers: standing on tip toes; fairly uncommon; the load is
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inorganic cofactor such as Magnesium to the rate of respiration of yeast was determined using Durham tube assembly with the substrate glucose. After thirty minutes‚ the test tube with the cofactor in the form of Magnesium sulphate MgSO4 showed the higher amount of carbon dioxide evolved which was measurable through volume and was one of the by- products of cellular respiration. This stated that the higher amount of CO2 evolved‚ the higher the rate of respiration. Thus‚ the hypothesis “If enzymes need cofactors
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efficiency * Muscle fiber type * Higher efficiency in muscles with greater
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