The role of hormones in the homeostasis of human body
Hormones work on maintaining the homeostasis of the internal environment in the human body through a mechanism called Feed mechanism, similarly, The Thermostat of different domestic makes machines start or stop working at a specific temperature ( It maintains the balance of machine working ) .
Feedback mechanism
Feedback mechanism is a mechanism with which hormones act to achieve the homeostasis in the human body , There are applications showing how hormones maintain the human body homeostasis through the feedback mechanism .
The feedback mechanism to balance the level of glucose sugar in the blood
Insulin hormone and glucagon hormone play an important role in homeostasis the level of glucose sugar in the blood .
On increasing the level of glucose sugar in the blood than its normal level , The pancreas responses by secreting insulin hormone which stores glucose sugar that increases in the body in the liver and it stimulates the body cells to absorb glucose from the blood .
Sugar in blood
On decreasing the level of glucose sugar in the blood than its normal level , The pancreas responses by secreting glucagon hormone which affects the liver to increase the conversion rate of glycogen stored inside it into glucose sugar to increase the level of glucose sugar in the blood until it reaches the normal level .
When the pancreas decreases its secretion of insulin hormone , The level of glucose sugar in the blood increases or the human suffers from diabetes disease .
What is Feedback mechanism to balance thyroxin hormone level in the blood ?
You should know that the thyroid gland and the pituitary gland have an important role in homeostasis the level of the thyroxin in the blood .
When the thyroxin hormone level is increased in the blood than its normal level , Pituitary gland responses by decreasing the thyroid stimulating hormone secretion , So , It decreases thyroxin hormone secretion from the thyroid gland to decrease its percentage in the blood until it reaches the normal level .
When the thyroxin hormone level is decreased in the blood than its normal level , Pituitary gland responses by increasing the thyroid stimulating hormone secretion that increase the thyroxin hormone secretion from the thyroid gland to increase its percentage in the blood until it reaches its normal level .
Pituitary gland in the body of dwarf persons secretes extremely small amounts of growth hormones , In the past , Scientists treated these people by injecting the human growth hormone extracted from the newly dead corpses in the children’s bodies with not enough growth hormone .
But , The amounts of growth hormone obtained by this method were extremely not enough in addition to the possibility of containing some microbes which may cause infection by various diseases .
In 1979 , by the genetic engineering technology, scientists manufactured sufficient amounts of the human growth hormone by inserting a human gene carries the instructions for information of the human growth hormone into DNA nucleic acid of the bacterial cells.
In this way , They were able to produce and collect large amounts of the human growth hormone by great numbers of bacteria ( in which this gene was inserted ) then, that hormone was refined and tested, In 1985, the researches conducted on this hormone proved its validity for the human use to treat the children of the limited growth.
Nervous system in man , Nerve cells types & Nature of nerve impulseÂ
Endocrine system, Endocrine glands, Pituitary gland & Hormonal coordination in living organisms
Homeostatic control mechanisms, Positive & Negative feedback mechanisms
