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Thermoregulation In Homeostasis

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Thermoregulation In Homeostasis
Title: Melting in Melbourne

Homeostasis is the ability to maintain a stable internal environment, despite it being affected from the conditions of the external environment. Thermoregulation is a homeostatic system that maintains the body's core internal temperature. For humans they must maintain an internal temperature of 36.7OC (this is the set point for the internal environment of a human to remain at homeostasis state).

Components of a homeostatic system is a receptor, a control centre and an effector;
The receptor that detects the change from a stimuli (when it becomes too hot or too cold) is a thermostat and/or a thermoreceptors. The thermoreceptors lies underneath the skin where it detects the change in skin temperature. The thermoreceptor
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Vasodilation will enables more blood to flow through the skin and heat will be lost through radiation. Sweat glands in the skin will secrete more sweat, it will cool the skin down as it evaporates after secretion. With this the internal body temperature will decrease back to set point with the thermostat being told to stop the cooling mechanism. When the control centre is told that the set point of the internal temperature has decreased (36.7OC → 35.8OC), it will tell the effector to constrict (become more narrow) the blood vessels and skeletal muscles to shiver. Vasoconstriction will have less blood flow in the skin so that heat is trapped in. The skeletal muscles will start to shiver, they will contract (energy from respiration) so that heat is produced to help the skin warm up. With this the internal temperature will increase back to set point with the thermostat being told to stop the warming mechanism.

So the homeostatic system of a tennis player (a human) who has been constantly in the sun, constantly doing exercise and not keeping hydrated will become unstable. The tennis player’s internal body temperature will move away from its set point, from the external environment of becoming too hot. The tennis player will experience the breakdown

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