Biology essay on feedback mechanisms

Homeostasis is the maintenance of equilibrium in a biological system by means of an automatic mechanism that counteracts influences tending towards disequilibria. Homeostatic mechanisms bound up at all levels in spite of appearance living systems, including the molecular, cellular, and world levels. in humans homeostasis involves the constant monitoring and regulating of legion(predicate) factors including, oxygen and carbon dioxide levels, nutrient and hormone levels and in primitive and organic substances. The concentrations of these substances in the consistency fluid remain un transportd, within limits, contempt changes in the external environment. There atomic number 18 two general slip focussing in which the body crapper respond to changes, these being ordained and negative feedback. damaging Feedback Negative feedback causes the body to respond in such a way as to reverse the direction of a change and this tends to bread and butter the internal environment at a constant, frankincense maintaining homeostasis. Sensors and receptors be what bring rough a reaction to picture conditions within the body remain favourable. Examples of negative feedback ar as follows. communication channel glucose levels The receptors of the pancreas are responsible for monitoring the blood glucose levels. The alpha-cells of the Islets of Langerhans release glucagons when glucose levels are low.

Glucagons promote the conversion of animal starch into glucose; the lack of glucose can thusly be compensated for by the new supply of glucose brought round from glucagons. The beta cells o f the Islets of Langerhans release insulin w! hen the levels of glucose in the blood is high. Insulin promotes the conversion of glucose into glycogen and this can be stored in the liver for later use. battle or flight In emergencies adrenaline is released by the body to override the homeostatic engage of glucose levels and promotes the breakdown of glycogen into glucose. epinephrine is secreted by the adrenal gland and its secretion leads to increased embrace rate, If you want to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper