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Temperature-sensitive describes properties or systems that change with temperature. In materials science, temperature-sensitive materials can alter color, phase, conductivity, refractive index, or mechanical properties as temperature varies. Common examples include thermochromic pigments, which change color with temperature, thermistors that vary electrical resistance with temperature, and thermoresponsive polymers or hydrogels that undergo volume or solubility changes at defined temperatures.

In biological and medical contexts, many enzymes, membrane processes, and gene regulatory elements are temperature-sensitive, with activity, permeability, or expression levels shifting as temperature changes. Temperature-responsive polymers are used in drug delivery and tissue engineering because they can swell, collapse, or release cargo in response to a temperature trigger.

In electronics and sensing, temperature sensitivity is characterized by coefficients such as the temperature coefficient of resistance and by response time and hysteresis. Design considerations include drift, stability, calibration needs, and potential fatigue from repeated temperature cycling. Temperature sensitivity also underpins applications in packaging labels, climate control, agriculture, and smart materials that adapt to environmental conditions.

Overall, temperature sensitivity is a broad concept describing how temperature influences physical, chemical, and biological properties, enabling sensors, actuators, and responsive systems across various fields.