Homestasis - Thermoregulation and control of blood sugar - Essay Example

The hypothalamus effects changes in response to alterations in body temperature by activating adjustments to effectors in the form of muscles manipulating body hair movement and operation of the sweat glands. Hence, the human body’ temperature can only be regarded as stable provided that the heat produced matches heat lost. The sustenance of the temperature of the body at a steady level is paramount given that the living processes within the cells closely depends on the action of the enzymes that work effectively in a set of stable conditions, especially at optimal temperature and pH.

Any alterations in the set properties influence the utility of the enzymes and can yield to the death of the cells, and, ultimately, the death of the whole organism. This stresses the significance of regulation and sustenance of a constant internal environment. Nevertheless, the internal environment may not be entirely constant as it may be tolerated to fluctuate, albeit at exceptionally constricted limits. Indeed, temperature regulation is imperative given that the speed of metabolic reactions is directed by enzymes activity that only functions optimally at temperatures that neighbor body’s core temperature of 37°C. . Devoid of enzymes activity, much of critical bodily functions would fail to take place at the required level, which leads to the death of the cells.

Q2 How the body gain and lose heat The outside temperature mainly differs significantly as the day progresses; however, the body temperature ought to be sustained at the core temperature of 37°C. This is well demonstrated in Jamel’s case given must be sustained at a constant 37°C with minimal variations while the outside environment is bound to change (Sircar 2008, 697). Given that the temperature in New York City stood at 10°C and there is a possibility that the temperature fluctuated prior the race, during the race, and after the race, Jamel’s body must adapt to the changing external environment.

This is achieved via a number of processes through which the body is subjected to, namely: vasodilation, sweating, shivering, and vasoconstriction (Sircar 2008, 697). During the race in which Jamel’s body temperature rises owing to the rise in metabolism, the sweat glands located within the skin are activated to secrete/release sweat on to the surface of the skin. The action of evaporation of sweat from Jamel’s body’s surface yields to rapid cooling of the body, which, in turn, yields a drop in body temperature.

How Jamel’s body Generate Heat Body energy (heat) is essentially gained through the action of two critical methods, namely: energy generation through metabolic and energy acquisition from environmental. Jamel’s body heat generation and preservation are facilitated by a number of factors: (1) increased muscular activity such as via shivering, which entails the transfer of stored chemical energy, which yields to a net increase in body heat around the skeletal muscle that flows