Endocrine#1%20ppt.%202010

Endocrine#1%20ppt.%202010 - Nursing 214 Endocrine System...

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Click to edit subtitle style Nursing 214 Endocrine System
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Endocrine system n Numerous glands throughout body n Glands synthesize and release chemicals called hormones
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Hormonal Regulation n Five Functions of Endocrine System: n Differentiation of fetus n n Growth Stimulation n In childhood/ adolescence n Regulation of Reproductive systems n Maintain optimal internal environment n Homeostasis n Control of corrective and adaptive functions
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Hormonal Regulation Stimulus Release Hormones Into Circulation Trigger specific Intracellular response
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Hormone Characteristics n Specific rate / rhythm of secretion n Operate within feedback systems: n Positive n Negative n Affect only target cells with specific receptors thus initiating specific functions n Constantly: n Excreted by kidneys or n Deactivated by liver or cellular mechanism
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STIMULATION OF HORMONE RELEASE n CHEMICAL FACTORS n ENDOCRINE Hormone from one gland controls another n NEURAL EXAMPLES: BS stimulates insulin(chemical) ANS stimulates insulin(neural) Cortisol(adrenal) stimulates insulin(endocrine)
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Feedback Loops n Feedback circuits are at the root of most control mechanisms in physiology. n Negative feedback loops are the most prominent in the endocrine system.
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HORMONE ACTION n Hormone is released into the circulation. How does the hormone know where to go? Cells must have appropriate receptors Sensitivity of these “target cells” depends on the number of receptors. Cells determine the # of receptor sites.
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This note was uploaded on 02/14/2011 for the course NUR 214 taught by Professor Criswell during the Spring '08 term at Purdue University-West Lafayette.

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Endocrine#1%20ppt.%202010 - Nursing 214 Endocrine System...

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