FRIGIDORECEPTOR Meaning and
Definition
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A frigidoreceptor is defined as a specialized sensory receptor located primarily in the skin and underlying tissues, responsible for detecting and responding to extreme cold stimuli. It is a type of thermoreceptor that specifically responds to temperatures below the threshold for thermal comfort, which typically range from 15°C to 25°C in humans.
Frigidoreceptors are highly sensitive and capable of detecting even slight changes in temperature. When exposed to cold temperatures, they respond by sending electrical signals to the brain, leading to various physiological responses aimed at maintaining homeostasis. These responses may include vasoconstriction (narrowing of blood vessels) to minimize heat loss, shivering to generate heat, and the activation of brown adipose tissue to generate heat through thermogenesis.
The presence of frigidoreceptors is most prominent in the extremities, such as the fingers, toes, and ears, where they play a crucial role in preserving body temperature during cold exposure. They allow individuals to perceive and respond to changes in temperature, such as avoiding prolonged exposure to extremely cold environments, reducing the risk of frostbite or hypothermia.
In conclusion, frigidoreceptors are sensory receptors that detect cold temperatures and initiate the necessary physiological responses to ensure the body remains within a viable thermal range. They are crucial for temperature regulation and provide valuable sensations and information regarding the external environment's thermal conditions.
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