Homeostatis Homeostasis 1.1 Describe why the human body requires relatively stable internal conditions. Human body is a complex of many systems that work in coordination with each other in order to provide the body with its energy needs and other necessities to carry out bodily work…
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For a single cell to work, the conditions must be stable. For example, if the water content of the body is too high or low i.e. high or low osmotic pressure would make the cells either shrink or swell leading to cellular death and a vicious cycle leading to tissue destruction and so on. Similarly cellular enzymes require an optimum and stable pH for them to work and degrade food products to simple carbohydrates, fats and amino acids for the body to produce energy. These are just two of many examples of why the human body needs stable internal environment (Brodie, 2005). 2.1 Identify and describe the components required for a homeostatic feedback mechanism. As mentioned earlier, the human body is composed of many systems and these systems work in coordination with each other in order for it to work normally. These systems require stable internal conditions and whenever these internal conditions are disturbed; there is a feedback system which acts immediately to get this disturbed internal environment back to normal. This feedback system includes mainly of receptors in some areas which when sense in disturbance in the normal conditions activate immediately and send signal to the appropriate centres (Guyton, 2011). These signals could be transmitted through 1) Nerve cells e.g. vagus nerve sending signal to the brain and control heart rate 2) hormones e.g. renin which is released by kidneys either when there is a disturbance in the blood pressure due to water content of the body. Renin ten causes the formation of angiotensin 1 and 2 and control water content of urine. Hormones and nerve cells have a major role in this feedback mechanism. Hormones such as adrenaline, insulin, thyroxin and acetylcholine are some of the major hormones in homeostatic feedback mechanism in controlling heart rate, blood sugar levels, metabolism and many other functions. Nerve cells on the other hand provide feedback mechanism by transmitting signals directly to the brain which then transmits signals back by nerve cells again to appropriate centres or causes the release of hormones to bring the body back to stability. Nerve cells also act by sending signals to the endocrine or exocrine glands present at certain locations in the body and cause direct release of hormones or other secretions (Guyton, 2011). 3.1 Describe the mechanisms involved in body temperature regulation. Regulation of body temperature is one of the most important homeostatic functions of the body as all the bodily enzymes and other systems require an optimum temperature i.e.98.6f to work normally. This most important function is performed by the temperature regulation centre present in the Hypothalamus in the brain. Whenever an increase or decrease in the body temperature is detected by the receptors present in peripheral regions of the body, immediate signals are transmitted to the hypothalamus which then sends signals to all the parts of the body for its regulations. In case of an increased internal temperature the hypothalamus sends signals to the peripheral blood vessels located mainly in the skin which dilate causing more blood to flow through them leading to heat loss and decreased metabolism to decrease heat production. Also, there is immediate activation of sweat glands located in the skin and excessive production of sweat causes loss of
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1.1: Body’s homeostatic mechanisms: The homeostatic mechanism of the human body is the process of maintenance of the static or the constant situations or conditions associated with the internal environment of the human body. This natural process is liable of controlling the mineral, water, air as well as the temperature concentration in the fluids of the human body within the narrow limits related to the inside as well as the outside structure of all the cells of the body (Rozelle and Wathen, 1993, p.3).
Like any other system, the endocrine system is composed of several organs and glands that make it capable to perform its part in the human body. Glands that comprise the endocrine system are the pituitary, pineal, and adrenal glands, thyroid, parathyroid, the hypothalamus, thymus, pancreas, testes in males, and ovaries in females.
A better understanding of the physiology of health includes answering the following questions: 1. Explain homeostatic mechanism? 2. Describe how homeostatic mechanism work to regulate osmoregulation and thermoregulation process? 3. Explain the function of cardiovascular and respiratory system in regulating body mechanisms?
The author of the paper states that homeostatic mechanism does not apply in the regulation of body temperature alone but it also applies in regulating osmolarity or solute concentration of blood. The regulation process is through the kidneys known to regulate water and electrolytes in the blood.
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It also defines the role of the endocrine system with emphasis on its production of glands that maintain the glucose and blood levels (Schulkin, 2003). However, consequences exist that can occur if the homeostatic process is disrupted especially for the mother.
There are a wide number of changes that occur in the body. If these changes do not occur and the homeostatic mechanism keeps them at a set point for example body temperature which needs to be lowered or increased as per the changes in the external environment and if this temperature is kept at a set point, the body may not be able to survive at all.
Homeostasis is the ability of systems or organism to be able to regulate their internal environment and maintain a stable constant condition in a changing environment by the release of hormones into the blood stream. Homeostasis is maintained by mechanisms in the body and all organs and tissues of the body carry out different functions aimed at maintaining constant conditions in the internal environment.
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