Summary
Summary The endocrine system
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Includes: -negative feedback mechanisms -glands and hormones -pituitary gland -thyroid gland -pancreases -adrenal glands -gonads
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Endocrine SystemBeSystem of glands that produce hormones
Hormones
Hormones are not recycledNew hormones need to be constantlymade
organic chemical messagengers carried in blood
cgsnt P.ggasj'effected by temp
Dr involved in chemical
co
ordination of body
control takes
place by chem
using hormones to send a Msg
from 1
part of body to another
Each hormone can
only affect specificorgans aTarget organs
Endocrineglands secrete hormones intoblood targetorgan
organicell affected
by a specific hormone
onthe targetorganhas receptors which detect the hormone can trigger a
response in cell
Types of Glands
a Exocrine have ducts secrete directly into target areas
b Endocrine8 No ducts nomoney got seated into blood travel
to target organ
a
b
, Negative feedback mechanisms
Homones Usually inhibitprevent or stimulate
There are receptors that moniter hormonelevel provide feedback to brain
This allows the to monitor hormonelevel respond accordingly
body
If level of hormone to highto low negativefeedback will cause appropriate respo
to bring levels back to normal dHomeostasis mechanisms that help maintain a
constantIstable internal environment
regardless ofchanges in the external
environment
Glands Hormones
Gland Hormones
pituitary gland Growth hormone ADHoxytocin
Prolactin Thyroid stimulating hormone
Luteniesing homone Fgm'Earing
Thyriodgland thyroxine
Pancreas glucagon t insulin
Adrenalgland aldosterone secretes adrenalin
Gonads LH FSH testostgggenetoestrogen
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