If the reactions that compose the stress response are chronic or if they frequently exceed normal ranges, they can lead to cumulative wear and tear on the body, in much the same way that running your air conditioner on full blast all summer will eventually cause wear and tear on it. For example, the high blood pressure that a person under considerable job strain experiences might eventually take a toll on his heart and set the stage for a heart attack or heart failure. Also, someone exposed to high levels of the stress hormone cortisol might become vulnerable to infection or disease because of weakened immune system functioning McEwen, Neuroscientists Robert Sapolsky and Carol Shively have conducted extensive research on stress in non-human primates for over 30 years.
Overview of the Immune System | NIH: National Institute of Allergy and Infectious Diseases
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Overview of the Immune System
High school students love learning about diseases through anatomy case studies! Multiple sclerosis is a disease of the immune system that affects the central nervous system. Case studies are perfect for extending thinking on a topic or for use as sub plans. Answer keys are included.
The urinary system consists of two kidneys, two ureters, a urinary bladder , and a urethra. The kidneys alone perform the functions just described and manufacture urine in the process, while the other organs of the urinary system provide temporary storage reservoirs for urine or serve as transportation channels to carry it from one body region to another. The kidneys, which maintain the purity and constancy of our internal fluids, are perfect examples of homeostatic organs.