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Compare and contrast endocrine system The function of the endocrine system is to regulate the body functions

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Introduction

Compare and contrast endocrine system The function of the endocrine system is to regulate the body functions by the use of hormones. The structure of the endocrine system is therefore the structure and location of all the main endocrine glands. The pituitary gland, thyroid, pancreas, adrenal glands, and the sex glands (testes) are some of the more important ones, but there are several others. The glands secrete hormones directly in to the blood, which act as messengers. The nature of messenger which is released by the gland, once it has recognised the stimulus is chemical. The messenger is transported in the blood stream, and its speed is relatively slow. ...read more.

Middle

As in the endocrine system, the effects of the messenger generally takes a long time, in the nervous system the effect is immediate. And the response is also very localised sometimes directed at just one muscle. As I mentioned earlier, in the endocrine system, the function of the endocrine system is to regulate the body functions by the use of hormones. There are two types of hormones. Steroid hormones and Amino-acid based hormones. Steroid hormones are produced by the Adrenal Cortex, the Ovaries, and the Testes. Steroid hormones don't have to bind with the plasma membrane receptors of the target cells; they enter freely. Within the cytoplasm, a steroid hormone can bind with a receptor protein; it will then enter the cell nucleus and bind with the DNA, where it will trigger changes in the chromosomes. ...read more.

Conclusion

Peptide hormones must send their message from outside the target cell (a two messenger system is commonly required for the action of most of these hormones) Peptide hormones attach to receptors on the plasma membrane, the first messenger carrying the message from the endocrine Gland to the Cell Surface, passes the message to another molecule inside the cytoplasm. Meanwhile the second messenger (the hormone-receptor complex) indirectly activates an enzyme that converts molecules of ATP to cyclic AMP inside the target Cell. Cyclic AMP acts as a second messenger by indirectly activating other enzymes and proteins in the target cell. Therefore the AMP initiates a chain of biochemical events that leads to functional changes within the target cell. A single hormone molecule binding to a receptor in the plasma membrane can result in the formation of many Second Messengers. ?? ?? ?? ?? Thomas Jamie ...read more.

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