Principles of homeostasis with negative feedback, Biology

The principle of homeostasis is controlling the heating system with a simple thermostat in a house. These components are essentials thermometer, source of heat turning it on or off the thermometer is controlled by a switch, when the temperature drops below a certain level the heating is switched on and when the temperature rises above a certain level the heating is switched off. There are many systems in the body that contribute to homeostasis the obvious, are the kidneys which regulates water and salt and remove substances that might poison the enzymes. The liver which regulates the level of glucose in the blood etc also the lungs regulate oxygen and carbon dioxide, the skin regulates temperature and the brain has the overall control of the homeostatic processes in the body. It checks the composition of the blood flowing through it and if it is too warm, too cold, too concentrated or has too little glucose, nerve impulses or hormones are sent to the organs concerned, causing them to make necessary adjustment.

Negative feedback is a control mechanism in which a change from the norm triggers off a response this allows the norm to re set. If the internal factor in question rose above its norm value, the corrective action taken by the body would cause the opposite (negative) effect. Therefore if the factor fell below its norm the corrective action would again have the opposite negative effect, causing it to rise to normal value. This is the process in which departure from a set level is detected by receptors. These convey information to effectors which bring about a return to the original value see diagram below.

2059_homeostasis.png

Posted Date: 2/22/2013 3:09:51 AM | Location : United States







Related Discussions:- Principles of homeostasis with negative feedback, Assignment Help, Ask Question on Principles of homeostasis with negative feedback, Get Answer, Expert's Help, Principles of homeostasis with negative feedback Discussions

Write discussion on Principles of homeostasis with negative feedback
Your posts are moderated
Related Questions
The question asks . . . 18 moles of moles of maltose are completely oxidized by the reactions of the final oxidative pathways (Embden-Myerhoff Pathway and Krebs Cycle). How many AT

State about the blood-aqueous barrier There is a blood-aqueous barrier which prevents the movement of substances from the plasma to the aqueous humour. If there is a breakdown

Nutrient stability as affected by processing of feeds Nutrient stability under normal conditions of storage and processing is one of the important factors determining the effe

In which areas of the globe is gymnosperm abundance noteworthy? These plants are the typical vegetation of cold regions as the taiga, or boreal forest, of the northern hemisph

life cycle of stentor

Explain the Absorption and Transport of Vitamin E? Absorption of vitamin E from the intestine depends on adequate pancreatic function, biliary secretion and micelle form

Describe what happens during activation of the lac operon. Lactose binds to the repressor protein, which causes the repressor protein to be released from the operator site. Th

Q. What do you mean by Transition Period? The transition period from the Renaissance to the Modern period produced many notable workers and much literature. Botanists gradually

Q. What are the three phases into which the HIV infection is often divided? The HIV infection is frequently divided into three phases the acute phase, from the infection to 1 u

OESTROU S CYCLE - Also known as heat period. Common in rabbit, cat, dog, sheeps. In this period desire for copulation occur. Possibility of fertilization is 100%.