the endocrine system chapter 18. lesson 1. endocrine glands ductless-or tubeless- organs or group of...
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The Endocrine SystemChapter 18. Lesson 1
Endocrine GlandsDuctless-or tubeless-organs or group of cells that secrete hormones directly into the bloodstream
Hormones are chemical substances that are produced in glands and help regulate many of your bodys functions
Hormones produced during puberty trigger physical changes in the body.
Pituitary GlandRegulates and controls the activities of all of the other endocrine glandsKnown as the master gland3 sectionsAnteriorIntermediateposterior
Adrenal GlandsHelp the body recover from stress and respond to emergenciesHave 2 partsAdrenal cortexSodium, urine, blood volume&pressure, metabolism of fat, protein & carbohydratesAdrenal medullaHeartbeat, respiration, blood pressure, digestive system
Problems of the Endocrine SystemDiabetes- disorder in which the pancreas produces too little or no insulin resulting in high glucose levelsSymptoms include fatigues, weight loss, thirst, and frequent urination
Graves DiseaseHyperthyroidismOveractive and enlarged thyroid glands produce excessive amounts of thyroxine.Symptoms include nervousness, weight loss, increased thirst, rapid heartbeat and intolerance for heatLow production of thyroxine is hypothyroidism. Causes fatigue, dry skin, weight gain, constipation and sensitivity to cold
Cushings DiseaseOverproduction of adrenal hormonesSymptoms include round face, humped upper back, thin and easily bruised skin, and fragile bonesCan occur in dogs too
GoiterEnlargment of the thyroid gland, caused by lack of iodine in the diet.
Since we have iodized salt, goiters have become rare in the U.S.
Growth DisordersCaused by abnormal amounts of growth hormoneWith early diagnosis and proper treatment a child with a growth disorder can reach a normal height
Acromegaly & GigantismAcromegaly is different than gigantism, although both conditions can have a similar cause. Acromegaly occurs in adulthood, when the long bones of the legs and arms have stopped growing. Gigantism occurs in childhood. People affected by gigantism can grow to great heights. One of the best-known examples is "Andre the Giant" (Andre Rousimoff), who was 6 feet 3 inches by age 12, and reached a height of 8 feet 4 inches in adulthood. Men and women are equally affected by acromegaly.