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Research into Homeostatis in Humans.

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Homeostasis: The tendency of a system, especially the physiological system of higher animals, to maintain internal stability, owing to the coordinated response of its parts to any situation or stimulus that would tend to disturb its normal condition or function. homeostasis. (n.d.). Dictionary.com Unabridged. Retrieved March 18, 2012, from Dictionary.com website: http://dictionary.reference.com/browse/homeostasis] Maintenance of a constant environment within and around living cells, particularly with regard to pH, salt concentration, temperature, and blood sugar levels. Stable conditions are important for the efficient functioning of the enzyme reactions within the cells. (c) RM 2012. Helicon Publishing is division of RM. Retrieved March 18, 2012, from talktalk.co.uk website: http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0008030.html A feedback in which the system responds in an opposite direction to the perturbation. It is a self-regulatory system in which it feeds back to the input a part of a system's output so as to reverse the direction of change of the output. The process reduces the output of a system in order to stabilize or re-establish internal equilibrium. There are several negative feedback in biological system to regulate and maintain homeostasis. ...read more.


The Sino-Atrial node, a small cluster of excitable cells located in the top part of the right atrium, generally referred to as the "pacemaker" sends impulses to the muscles fibers to cause a contraction. The control center for the cardio-vascular system is the medulla which is the lowest part of the brain which regulates the heart rate and modifies it as to reflect responses to the sympathetic and parasympathetic nervous systems. Respiration, also known as the breathing rate, is controlled by the respiratory center in the medulla and is responsible for the rate, depth and rhythm of each breath. This system can be voluntary overridden by cerebral cortex. This happens when a person holds their breath, speaks or takes a deep breath. This system reacts when chemo-receptors, that measure the H+ ion levels and send this information to the medulla, detects a change to the level of carbon dioxide circulating in the blood. When these levels are elevated such as during exercise messages are sent to the brain to increase the breathing rate in order to expel the carbon dioxide and increase the intake of oxygen. ...read more.


Without Respiration the body would be unable to perform gaseous exchanges in the blood so the body would be unable to dump carbon dioxide and other waste gasses and be unable to obtain oxygen. Without Thermoregulation the body would be unable to maintain a constant internal temperature which could lead elements such as water to freeze or enzymes to die or become denatured. Without Blood sugar controls the body would be unable to host a continuous and stable level of energy for metabolic reactions and thus cause biochemical disturbances. The exercise session I participated was unplanned and could have been improved and made more reliable if I had a verifier to check my breathing rate. I am unable to provide a blood sugar level reading as I did not have the required equipment. The normal resting breathing rate is 16-20 times a minute. The normal resting core temperature is 36-37 degrees centigrade. The normal resting heart rate is 60-80 bpm. To ensure the validity of this test I should have repeated the exercise a few hours or days later to identify abnormalities. ?? ?? ?? ?? 5.5 Homeostasis Liam Dolman - 236687 ...read more.

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