Information Assurance (IA) refers to the steps involved in protecting information systems, like computer systems and networks. There are commonly five terms associated with the definition of information assurance: Integrity; Availability; Authentication; Confidentiality; Nonrepudiation; IA is a field in and of itself. It can be thought of as a specialty of Information Technology (IT), because an IA specialist must have a thorough understanding of IT and how information systems work and are interconnected.
Overview of Hypothalamic and Pituitary Hormones. The pituitary gland is often portrayed as the master gland of the body. Such praise is justified in the sense that the anterior and posterior pituitary secrete a battery of hormones that collectively influence all cells and affect virtually all physiologic processes. The pituitary gland may be king, but the power behind the throne is clearly the hypothalamus.
For example, the pituitary gland (endocrine gland) secretes thyroid-stimulating hormone, which acts on the target organ, the thyroid gland, to stimulate production of the thyroid hormones T3 and T4.The pituitary then monitors the circulating levels of thyroid hormones.n negative feedback, the endocrine gland has a natural tendency to over-secrete its hormone. The hormone then stimulates the target tissue to perform a function. Thus, the important factor is not the rate of secretion of the hormone but the rate that the target function is performed.