Science LT 1 Endocrine System

thymus gland secretes

thymosin

thymosin function

enables the body to produce antibodies (T cells, type of white blood cells)

thymus gland location

in front of the heart

adrenal gland secretes

adrenaline

adrenaline function

triggers the body's fight-or-flight response (prepares

the body for action, controls heart rate and breathing in times of emergency

adrenal gland location

on top of the kidneys

pancreas gland secretes

insulin and glucagon

insulin and glucagon function

regulates blood sugar levels

pancreas gland location

between the kidneys

testes secrete

testosterone and androgen

testosterone and androgen function

control maturation and male characteristics

testes location

lower abdomen, inside scrotum

ovaries secrete

progesterone and estrogen

progesterone and estrogen functions

control maturation and female characteristics, influence female traits and reproductive function

ovaries location

lower abdomen

2 Feedback mechanisms

negative feedback and positive feedback

negative feedback

inhibits the production of hormone

positive feedback

stimulates production of hormone

______________ means that when enough hormone is in the body, the body stops producing the hormone until it is needed again.

Negative feedback