Download Endocrine Powerpoint AB1 File

structure that secretes hormones directly
into the bloodstream
•surrounded by capillaries
•without ducts/tubes
•endocrine glands don’t have tubes that lead to organs to
deliver their hormones, that’s why they’re carried in the
circulatory system
proteins that travel in your bloodstream to target tissues
(other glands or muscles) to control some activity (heart
rate, blood pressure)
•structure on a cell membrane that
receives messages from the environment
•messages are often hormones, used to
communicate between cells
•change in the external or internal environment
•causes a hormone to be released
reaction to the stimulus
•when one hormone stimulates or stops another gland’s
function
•helps to maintain homeostasis
Ex)
action
eat a meal, blood sugar
gland function
pancreas releases insulin, not glucagon
btwn meals (hungry),
blood sugar
pancreas releases glucagon, not insulin
hormones are chemicals that act as messengers
ex) they send messages to increase heart or growth rate
base of brain
throat
deep in abdomen
on top of each
kidney
HGH Human Growth
Hormone
TSH Thyroid Stimulating
Hormone
thyroxin
insulin
glucagon
adrenalin &
steroids
controls growth
tells thyroid to secrete thyroxin
regulates metabolism
moves extra glucose from blood into
liver
takes glucose out of liver & puts back into
blood
increase heart, breathing rate
•unequal distribution of plant hormones
•causes unequal growth called a tropism
Ex) phototropism-when light causes an unequal hormone distribution & plant grows toward the light
geotropism- when gravity causes and unequal hormone distribution & roots grow down
•a plant hormone
•affect growth, development, flowering, seeds
Disorders of the Endocrine System
Goiter-
•caused by a lack of iodine in diet
•thyroid gland is enlarged
Diabetes•caused by a lack of insulin, leads to too much sugar in the blood
•malfunction of cells in pancreas called Islets of Langerhans
Giantism-
•too much human growth hormone
•results in extreme tallness
•malfunction of pituitary gland
Acromegaly
Dwarfism-
•not enough human growth hormone
•results in dwarfness of height
•malfunction of pituitary gland
Disorder
ppt.
Similarities of the Nervous &
Endocrine Systems
both help maintain homeostasis
both use chemicals:
Nervous sys- neurotransmitters
Endocrine sys- hormones
Differences between the Nervous &
Endocrine Systems
Nervous sys- messages faster, messages carried on neurons
Endocrine sys- messages last longer, carried by circulatory
system.