Ch. 39-1 & 39-2: I. Endocrine System. FUNCTION : Transmit chemical messages to control growth, development & metabolism. Question Time!. The endocrine system transmits chemical messages to: Control growth Control metabolism Fight off antigens All of the above A & B. A. Hormones & Glands.
FUNCTION: Transmit chemical messages to control growth, development & metabolism
The endocrine system transmits chemical messages to:
Hormone = secreted chemical in blood stream or ducts that affects cells
Ex: Human growth hormone (HGH), insulin
Gland = organ that releases hormones into body
Message delivered throughout the body
Body’s response is slower than nerve impulse
1)EXOCRINE gland – secrete substance through ducts(Ex: sweat, tears)
2) ENDOCRINE gland – secretes hormones into bloodstream
The exocrine gland secretes hormones into bloodstream and the endocrine gland secretes substances through ducts.
True or False
1.Pituitary gland (in brain)
2. Thyroid (in neck)
3. Adrenal glands (above each kidney)
Which statement is not true?
Thyroid glandcontrolled by hypothalamus & pituitary gland
Hypothalamus sense low levels of thyroxine in blood & sends a message to pituitary releases hormone
Signals the thyroid to produce & release thyroxine
Thyroxine sent to cells to speed metabolism
Decrease Hormone Production
Increase Hormone Production
High Hormone Level