Name: Andrea Silva Date: May 16th‚ 2014 Student Exploration: Homeostasis Vocabulary: dehydration‚ heat stroke‚ homeostasis‚ hypothermia‚ thermoregulation Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Homeostasis is the ability to maintain a stable environment inside the body. For example‚ your body does things to maintain constant blood sugar levels and body temperature. 1. What are some things you do to stay cool on a hot day? Some things I do to stay
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7/21/2013 | | This experiment is to calibrate a constant pressure calorimeter to experimentally determine a series of heats of reaction that will be used to predict the enthalpy of reaction for another reaction using Hess’ Law and to determine heats of dissolution for a number of ionic salts that will be used to predict lattice energy again by using Hess’ Law. Heat may increase during experiment and undergo exothermic reaction. Analysis: Q = m c (Tf - Ti) = 27.9°C – 21.3°C = 6.6°C Q =
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What is the significant difference in the amount of heat (in Joules) absorbed by the eutectic alloy at different time intervals? 3. What is the temperature of the PC: 3.1 With the processor fan 3.1.1 and the built in cooling system? 3.1.2 the built in cooling system‚ and the eutectic alloy as heat sink? 3.2 Without the processor fan 3.2.1 and the built in cooling system? 3.1.2 the built in cooling system‚ and the eutectic alloy as heat sink? 4. What is the significant difference in the temperature
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uses to heat itself are constricting blood vessels and skin and making muscles shiver to produce heat. 11. a. The stimulus is the raised body heat‚ and the response is to cool the body by sweating or dilating blood vessels and skin. The signal is what the hypothalamus sends when it detects high body heat. b. This feedback loop is negative‚ because it is lowering the body heat from above 37 degrees to about 37 degrees.
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signals to either cool or heat the body. 9. According to Model 2‚ the Hypothalamus is the portion of the brain that contains sensors that monitor body temperature. 10a. Two mechanisms the body uses to cool itself are when blood vessels in skin dialate to radiate heat and sweat glands increase sweat production. 10b. Two mechanisms the body uses to heat itself are when blood vessels in the skin constrict‚ and reducing heat loss and muscles begin to shiver‚ generating heat. 11a. The stimulus in the
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feathers and a thick layer of subcutaneous fat to conserve body heat‚ a necessity in an aquatic environment where the rate of heat loss is 30% faster than in air. Penguin’s tuxedo is a camouflage that protects them from avian and aquatic predators. The white reduces their visibility at the waters surface and the black makes them resemble the oceans bottom. Penguin’s large body allows them to stay in the water longer with minimized heat loss due to their lower surface area to volume ratio. These are
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concept is presented which utilizes liquid nitrogen as the working fluid for an open Rankine cycle. The principle of operation is like that of a steam engine‚ except there is no combustion involved. Liquid nitrogen is pressurized and then vaporized in a heat exchanger by the ambient temperature of the surrounding air. The resulting high – pressure nitrogen gas is fed to the engine converting pressure into mechanical power. The usage of cryogenic fuels has significant advantage over other fuel. Also‚
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of basking postures have a major effect of how butterflies produce their heat. Because the wings are such poor conductors for heat‚ only the parts of the wing within a few mm of the thorax can contribute to this‚ according to Kingsolver. The graph during the experiment showed that different postures have significant impact on butterflies on how they produce their heat. It showed that dorsal produce the least amount of heat‚ while lateral and relectance had a different outcome. This experiment‚ which
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efficiency and industrial standards‚ maintaining a thermal comfort is essential requirement. Because of high relative humidity level in Sri Lanka‚ direct evaporative cooling can’t be used to reach required thermal comfort level. Solid dehumidification with heat exchanger was added to the design to overcome the problem. This paper analyses the results of the new method and attempts to provide acceptable‚ cost-effective solution. Dealing with small air capacities for evaporative cooling was
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Name: ______________________________________ Date: ________________________ 1.3.1.2 - Human Homeostasis Vocabulary: dehydration-lack of water needed in your body Heat stroke-highest body temperature where you need medical attention Homeostasis- when an organism maintains stable internal conditions in a changing environment Hypothermia-lowest body temperature where you need medical attention Involuntary-automatic occurance Thermoregulation -the process in which a steady temperature is
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