THE HUMAN ENDOCRINE SYSTEM
HORMONES CHEMICAL CO-ORDINATION
Chemical messengers receptors pick up stimuli - so that the body can
Mostly proteins detect changes
Some are steroids Effectors respond appropriaitly
Carried in the blood to target organs The nervous system works similarly
To regulate metabolic activities
Target organs have receptors for specific hormones Stimulus Response
= Message
ENDOCRINE GLANDS
Pineal Gland Speed: relatively slow
Hypothalamus
Chemical message: hormones
Duration: lasts longer
Pituitary gland Transported: via bloodstream
Parathyroid
Thyroid gland
glands
Adrenal Glands Pancreas Is responsible for HOMEOSTASIS
The maintenance of a constant internal
LANDS
RINE G environment of the human body in a
ENDOC ssels d ve
Ductless plied with bloo e blood stream
p th balanced state
Richly su ormones into
s h rgans
Secrete target o
es ac t on the
n
Hormo
The mechanism enabling an organism to correct
any changes from a set point and maintain
Testes Ovaries homeostasis is NEGATIVE FEEDBACK
HORMONES CHEMICAL CO-ORDINATION
Chemical messengers receptors pick up stimuli - so that the body can
Mostly proteins detect changes
Some are steroids Effectors respond appropriaitly
Carried in the blood to target organs The nervous system works similarly
To regulate metabolic activities
Target organs have receptors for specific hormones Stimulus Response
= Message
ENDOCRINE GLANDS
Pineal Gland Speed: relatively slow
Hypothalamus
Chemical message: hormones
Duration: lasts longer
Pituitary gland Transported: via bloodstream
Parathyroid
Thyroid gland
glands
Adrenal Glands Pancreas Is responsible for HOMEOSTASIS
The maintenance of a constant internal
LANDS
RINE G environment of the human body in a
ENDOC ssels d ve
Ductless plied with bloo e blood stream
p th balanced state
Richly su ormones into
s h rgans
Secrete target o
es ac t on the
n
Hormo
The mechanism enabling an organism to correct
any changes from a set point and maintain
Testes Ovaries homeostasis is NEGATIVE FEEDBACK
