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THE ENDOCRINE SYSTEM (ENDOCRINE GLANDS (hypothalamus (produces realising…
THE ENDOCRINE SYSTEM
ENDOCRINE GLANDS
hypothalamus
produces realising hormones
(neurohormones)
control activity
pituitary gland
pineal gland
controls
daily sleep-wake cycle
using hormone
melatonin
pituitary gland
directs activity
other endocrine glands
variety of hormones
including
oxytocin
stimulate
uterine contractions
growth hormones
control
elongation of bones
gonadotropic glands
act
sex organs
thyroid gland
regulates body's overall metabolic rate
with thyroxin
and also produces
calcitonin
increases blood calcium levels
adrenal glands
help to
regulate kidney function
with aldosterone
prepare organism
for high-stress situations
with adrenaline
regulate metabolism
with cortisol
pancreatic islets
control blood glucose levels
with two antagonistic hormones
insulin
glucagon
gonads
contribute development sex organs
and secondary sexual characteristics
by producing sex hormones
this tests
produce
ovaries produce oestrogen
progesterone
testosterone
HOW IS THE ENDOCRINE SYSTEM REGULATED?
activity endocrine glands
regulated by the brain
most part
brain manages endocrine system through two glands
pituitary gland
produces and secretes
hormones
direct many other glands
around the body
hypothalamus
directs the pituitary
is just beneath it
SELF REGULATION
hormonal regulation
normaly involves
negative feedback mechanisms
when the level of a particular hormone
too high or too low
this incorrect level
triggers its own correction
formed
by a group
organs and glands
work together
to regulate
how our body functions