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These glands work to build and secrete unique chemical compounds known as hormones ... Then these hormones move through the blood to a separate group of organs to affect them ... These hormones only affect special cells called target cells ... But how These hormones will be linked to the target cells ... and to answer this question we have to know the chemical composition of the hormones ... where hormones are synthesized either from amino acids that are dissolved in water or from fat derivatives that are dissolved in fats ... As we explained in the above, The membranes covering our body cells are made up of fats ... This means that the hormones dissolved in the water cannot penetrate them, and that is why the target cells are covered with special receptors for these hormones to allow them to enter the cells ... while the hormones dissolved in fat can easily enter the target cells and then receive With its receptors from inside the cell .. In both cases, hormones enter the cells to change the activities of these cells by increasing some functions and reducing some others, and the goal of that is to maintain the body's homeostasis ....
If the hormones are working to maintain homeostasis in the body..this is due to the activities or habits that we do ... or even the foods we eat ... for example, when we overeat on sugars, this will result in a significant increase in the level of glucose in the blood..and the gland will rise The pancreas treats this increase by releasing the hormone insulin from its beta cells ... Then the insulin hormone goes to the liver to enter it. His own cells or target cells ... in order to stimulate them to store glucose in the form of glycogen or fat ... and thus the glucose level begins to decrease and return to its normal level .... But while we refrain from eating sugars for a long time, this will lead to a decrease in the percentage of glucose in The blood ... so the pancreatic gland handles the matter again through its secretion of the hormone cloaca, it was from its own alpha cells ... then the clocacan goes to all the cells of the body to stimulate them to return the stored glucose to the blood and at the same time it goes to the liver to inhibit the process of storing glucose into clayogen glycogensis and its conversion to the process of breaking down glycogen into glucose or glycogenlysis, and thus the glycogensis hormone has returned the glucose to its normal level in the blood ..
Endocrine diseases often arise as a result of too much or too little secretion of some hormones, which leads to a loss of homeostasis ...
There are many reasons that affect the secretion of hormones by the glands .. One of these reasons is the disorder of the main glands directed at the secondary glands ... Of course, the function of some hormones is limited to controlling the secretions of other hormones .. which are also responsible for the secretion of other hormones ... When a major hormone begins its work, a series of hormones begin their action one hill and the other gradually ... This process is called hormone cascades. One example of these sequences is the hypothalamic pituitary adrenal axis, or HPA AXIS, which is a set of complex interactions that take place. Between three glands to regulate many daily body practices such as digestion, immunity and sex .... They do this by coordinating them with the nervous system in general and the sympathetic nervous system in particular ... When we do physical efforts, our sympathetic nervous system begins to lower the blood pressure in the digestive system and raise it in the hands And the feet, while the role of the endocrine system is to prepare all the elements that the sympathetic system needs in its work ... The main question about the functioning of these two systems together is the hypothala gland. mus is the meeting point of the two systems ... as it monitors everything that happens in the body through its monitoring of chemical signals sent by the sense centers of the nervous system.