Thermal Regulation
Thermal Regulation - Related Videos
10:32
Thermal Diffusivity and the Laser Flash Method
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2023
Source: Elise S.D. Buki, Danielle N. Beatty, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT The laser flash method (LFA) is a technique used to measure thermal diffusivity, a material specific property. Thermal diffusivity (α) is the ratio of how much heat is conducted relative to how much heat is stored in a material. It is related to thermal conductivity (), how much heat is transferred through a material due to a temperature...
07:08
Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus
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Cited by 1 •
2020
We provide a method for identifying modulators of foliar transpiration by large-scale screening of a compound library.
09:42
Analysis of Thermal Expansion via Dilatometry
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2023
Source: J. Jacob Chavez, Ryan T. Davis, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Thermal expansion is extremely important when considering which materials will be used in systems that experience fluctuations in temperature. A high or low thermal expansion in a material may or may not be desirable, depending on the application. For instance, in a common liquid thermometer, a material with a high thermal expansion would be...
09:02
Rapid PCR Thermocycling using Microscale Thermal Convection
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Cited by 21 •
2011
We describe a novel method to perform DNA replication via the polymerase chain reaction (PCR). Thermal convection is harnessed to continuously shuttle reagents between denaturing, annealing, and extension conditions by maintaining opposing surfaces of the reactor at constant temperature. This inherently simple design promises to make rapid PCR more accessible.
01:27
Thermal expansion and Thermal stress: Problem Solving
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2023
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures? To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
FAQs
A sensory receptor detects a temperature deviation, and the hypothalamus coordinates a negative feedback response that counteracts the disturbance. Responses differ according to whether the organism is overheated or chilled, allowing body temperature to remain within a functional range. This feedback architecture illustrates how thermal regulation contributes to biological homeostasis.
When an endotherm overheats, vasodilation and sweating help address the thermal challenge; when it becomes chilled, vasoconstriction and shivering provide contrasting responses. These mechanisms represent opposite adjustments to changing conditions rather than isolated reactions. Examining them together shows how the body responds in directionally appropriate ways to reduce temperature imbalance.
Endotherms and ectotherms differ in the relative importance of their regulatory strategies. Endotherms coordinate physiological responses through sensory detection and hypothalamic control, whereas ectotherms depend more heavily on behavior and environmental selection. This comparison helps biologists interpret how organisms cope with environmental temperature change and why regulation is not identical across biological groups.
A useful biological analysis begins by identifying how sensory receptors detect deviation, then tracing hypothalamic coordination of the response. The analysis should also consider vasodilation, sweating, vasoconstriction, shivering, behavior, and insulation as potential components. Comparing these responses during overheating and chilling connects mechanisms to homeostasis.
Studying thermal regulation connects individual physiological responses with broader biological questions. It helps explain homeostasis, the maintenance of internal conditions within a functional range, as well as adaptation to environmental demands. The topic also provides context for examining responses to disease, seasonal change, and climate stress, linking organismal function to changing conditions.
Environmental change can be considered through the contrasting strategies described for endotherms and ectotherms. Researchers can examine physiological responses such as vasodilation, sweating, vasoconstriction, and shivering in endotherms, while assessing behavior and environmental selection in ectotherms. This comparison helps frame how seasonal change and climate stress affect temperature control across organisms.