Endocrine System Flashcards
(12 cards)
Endocrine Functions
regulates chemical composition (internal & external)
regulates metabolism
regulates some immune function
controls growth and development
regulates the operation of reproductive systems
helps establish circadian rhythms
Exocrine
secretes substances into a ducts system
endocrine
secrete substances directly into blood stream
secretion=hormones
non steroid hormones
water soluble
whole proteins or amino acids
sSteroid hormones
lipid soluble
pass through membrane
Permissive Effects
target cell is made more responsive to a second hormone when the first has opened receptor sites
Synergistic Effect
2 hormones acting together has a greater effect than the sum of each individual one
Antagonistic Effect
one hormone opposes the action of another
Hormone Regulation
Negative feedback
Positive feedback
Negative feedback
reverse the environment or if levels get out of balance
ex=insulin
Positive feedback
less common
used to amplify changes
ex=oxytocin
Anterior Pituitary
adenohypophysis
