Download Endocrine system

ENDOCRINE SYSTEM
The endocrine system is vital in regulating mood,
growth and development, tissue function,
metabolism, and sexual function and reproductive
processes.
The endocrine system oversees body processes that
happen slowly, such as cell growth.
Homeostasis is the maintenance of a constant internal environment, with chemical and
temperature equilibrium. The functions of the Endocrine System are to maintain
homeostasis in the body by releasing chemicals called hormones. Hormones control
reproduction; growth and development; mobilization of body defenses against stressors;
maintenance of electrolyte, water, and nutrient balance of the blood; and regulation of
cellular metabolism and energy balance. The Endocrine System regulates processes that
continue for periods of time.
Negative Feedback -The body senses an internal
change and activates mechanisms that reverse, or
negate, that change.
An example of negative feedback is body temperature regulation. If blood temperature rises
too high, the hypothalamus of the brain senses it. It sends messages to the blood vessels of
the skin that tell them to dilate. More blood flows close to the body surface and excess heat
radiates from the body. If this is not enough to cool the body back to its set point, the brain
activates sweating.
DIABETES I AND II
AFFECTS 8.3% OF THE POPULATION
In type 1 diabetes, the body does not produce
insulin, a hormone that is needed for cells to
uptake glucose. Symptoms include increased
thirst, weight loss, fatigue, blurred vision.
Only 5% of people with diabetes have this
form of the disease.
Treatment:
•
Taking insulin
•
Exercising regularly and maintaining a
healthy weight
•
Eating healthy foods
•
Monitoring blood sugar
With type 2 diabetes, the cells either resist the
effects of insulin or the pancreas doesn’t
produce enough insulin to maintain a normal
glucose level. It can be kept under control
with diet and exercise and insulin injections.
Untreated, type 2 diabetes can be lifethreatening. The symptoms of type 2 diabetes
are similar to those of type 1, but include slow
healing rate and increased susceptibility to
infection.
One disorder of the endocrine system is precocious puberty, in which the body
starts sexual development too soon
Signs and symptoms of precocious puberty occur before ages 8-9
Precocious puberty symptoms in girls include:
• Breast growth
• First period (menstruation)
Precocious puberty symptoms in boys include:
• Enlarged testicles and penis
• Facial hair (usually grows first on the upper lip)
• Deepening voice
It can be caused by tumors in the brain or abnormal growths in the endocrine
glands or be hereditary in origin. When there is no underlying medical condition,
the patient is given monthly injections of a puberty-suppressing hormone until
the normal age of puberty. However, if there is another medical condition
causing precocious puberty, such as a tumor that is producing hormones, the
condition will case when the tumor is removed.
http://kidshealth.org/teen/your_body/body_basics/endocrine.html
http://ladyleanslessons.blogspot.com/2011/02/ladyleans-lesson-6.html
http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/
bio%20102%20lectures/endocrine%20system/endocrin.htm
http://www.biologyreference.com/Ho-La/Homeostasis.html#b
http://moodle.schoolnet.lk/file.php/21/homeostasis/tempcont.htm
http://www.mayoclinic.com/health/type-1diabetes/DS00329/DSECTION=symptoms
http://www.nlm.nih.gov/medlineplus/endocrinediseases.html