Download Endocrine System

Endocrine System
A.
Function:
 Secrete hormones into the circulatory system that will
cause a change in the body in a different location
 Regulated by feedback mechanisms
 Stimulus-Response
 Hormones are only released until the
appropriate changes are made (homeostasis is
restored)
B.
Structures:
1.
Endocrine Glands:
 Structures/organs that secrete chemicals
(hormones) into the circulatory system
2.
Hormones:
 Chemicals that are specific in activity
 Only work on specific organs/tissues (target cells)
 Specific in shape
 Bind with receptor molecules on the out surface
of the target cells
 Effects are slow and long-lasting
C.
Glands and Hormones
Gland
Hormone
Function & Problems
1. Hypothalamus
(brain)
(nervous tissue)
-controls the pituitary
by hormones and nerves
2. Pituitary
1. Growth Hormone
(**master gland)
-regulates growth
(dwarfism, gigantism)
2. Thyroid Stimulating -turns on/off
Hormone (TSH)
thyroid gland
3. Follicle Stimulating
Hormone (FSH)
3. Thyroid
(throat)
Thyroxine
- stimulates
meiosis in gonads
- regulates metabolism
- contains iodine
(hyper/hypothyroidism, goiter)
4. Parathyroid
Parathyroid H. - regulates calcium levels
5. Adrenal
1. Aldosterone
(kidneys)
2.
- regulates water by
controlling blood pressure
Epinephrine/
Adrenaline
-  BP, HR, respir.
Fight or Flight
6. Pancreas
3. Norepinephrine
-  BP, HR, respir.
1. Insulin
-  blood glucose by
storing it in the
liver as glycogen
2. Glucagon
-  blood glucose
(DIABETES)
7. Ovary
Estrogen
8. Testes
Testosterone
- FSH  estrogen to
produce eggs
- FSH  testosterone
to produce sperm