Coordination of body systems by Chemical control of hormones The Endocrine System Chapter 35.3 Coordination of body systems by Chemical control of hormones

I A. Systems that chemically coordinate the body: NERVOUS ENDOCRINE Stimuli-response Rapid response Short time Slow response Lasts long time Both=HOMEOSTASIS

B.Components of the Endocrine system 1. Glands make ? Hormones or chemical messengers 2. Travel through ? Blood stream (Ductless glands) 3. To where ? Specific Target Organs Pituitary Thyroid Thymus Adrenal Pancreas Ovaries Testes

Examples of hormones & glands... Mammary glands prolactin Ovaries make estrogen Testes make testosterone Adrenal make adrenaline

IIA.Hypothalamus: Brain area that controls the Master Gland: Pituitary Also controls oxytocin for uterus contraction & ADH for water balance in the kidneys

Pituitary:The Master Gland that controls other endocrine glands Makes TSH Thyroid hormone for metabolism LH & FSH for Reproduction GH Growth hormone Adrenal hormone

Adrenal Medulla makes epinephrine & norepinepthrine Adrenal gland sits on top of the kidney Controls “fight or flight” response Superhuman strength @ adrenaline

Pancreas: Regulates sugar balance Insulin = sugar into cells Glucagon = sugar leaves the liver

Insulin sources for diabetics : From domestic livestock Genetically engineered bacteria

Feedback thermostat . . . . . . .

Feed back loop . . . . . . . High Blood sugar Pancreas makes insulin Sugar enters the cells Blood sugar lowered Low Blood sugar Pancreas makes glucagon Sugar leaves the liver Blood sugar is increased

= Sugar goes into the cell High Blood sugar Glucagon Releases Sugar From liver Pancreas makes Insulin Cell needs sugar Low Blood Sugar = Sugar goes into the cell

Thyroid: controls metabolism with thyroxine hormone Pituitary gland controls the thyroid with TSH Iodine is important for the thyroid tissue Goiter results from lack of iodine