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

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

3. 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

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

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

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

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

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

9. Insulin sources for diabetics :
From domestic livestock
Genetically engineered bacteria

10. Feedback thermostat

11. 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

12. = 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

13. 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