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Homeostasis

Homeostasis

HOMEOSTASIS, STRUCTURE AND FUNCTION, AND TRANSDUCTION IN THE BODY SYSTEMS.

Homeostasis within the endocrine system is vital for the metabolic activities of cells.  The endocrine system uses hormones to administer and integrate major processes such as reproduction; growth and development; and maintaining electrolyte, water, and nutrient balance of the blood.  
	Peptide hormones bind to receptors on target cell membranes. This process activates a signal transduction pathway inside the target cell causing the appropriate response within the cell.
	Steriod hormones can pass through the lipid bilayer and bind to receptors inside the cell.  This process creates a transcription factor that can turn certain genes on or off thus leading to the appropriate response within the cell.  
	To maintain homeostasis the body must regulate the levels of specific hormones at all times through feedback interactions between hormones and their glands.
	If the pituitary gland stopped releasing enough GH (growth hormone) it would result in a condition called pituitary dwarfism (the affected person only reaches about 4 ft. tall).  An excessive amount of GH in the preteen years results in a pituitary giant. 
	Immunity refers to the body’s capacity to resist invading organisms and toxins to prevent tissue and organ damage.

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Word Count: 614

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