The Endocrine System Chp35 Flashcards
What are exocrine glands
release their product into ducts or tubes
What are endocrine glands
a ductless gland that produces hormones, which are released directly into the bloodstream
What is a hormone
a chemical messenger produced by an endocrine gland and carried by the bloodstream to another part of the body, where it has a specific effect
What are the differences between the nervous and endocrine system
Nervous: fast-acting, mostly electrical, short-lived. Endocrine: slower-acting, chemical, long-lasting
Glands in the body
hypothalamus, pineal, pituitary, parathyroid, thyroid, thymus, adrenal, pancreas, ovary, testis
What is the role of the pituitary gland
produces growth hormone with many others
What is the role of the hypothalamus
produces anti-diuretic hormone (ADH) which causes water to be reabsorbed in the kidney
What is the role of the pineal gland
produces melatonin
What is the role of the thyroid
produce thyroxine which controls the the metabolism
What are the symptoms of a thyroxine deficiency
low metabolic rates, low mental and physical development
What is a corrective measure for thyroxine deficiency
thyroxine tablets
What are the symptoms of a thyroxine excess
increased metabolic rate, hunger, loss of weight
What is a corrective measure for thyroxine excess
remove part of the thyroid
What is the role of the parathyroid
make parathormone which stimulates the release of calcium from bone into blood plasma
What is the role of the thymus
produces thymosin which causes lymphocytes to mature and become more active
