gure he anatomy of some of the endocrine glands. (b)An islet of Langerhans within the pancreas Chapter 11 ENDOCRINE SYSTEM Pituitary Thyroid gland Parathyroid glands (behind thyroid gland Pancreas Ovary Creek Testis
1 Chapter 11, ENDOCRINE SYSTEM
Section 1 Introduction I. Concept of Hormone a hormone --chemical substance secreted into the interstitial fluids by one specialized cell or a group of cells --exert physiological control effect on other cells of the e body
2 Section 1 Introduction I. Concept of Hormone A hormone – --chemical substance --secreted into the interstitial fluids by one specialized cell or a group of cells --exert physiological control effect on other cells of the body
l Endocrine Vs Nervous syste
3 II. Endocrine vs. Nervous Syste
Nervous system exerts point-to-point control through nerves ° Similar to sending messages by conventional telephone electrical in nature and fast
4 Nervous system •exerts point-to-point control through nerves, •similar to sending messages by conventional telephone. •electrical in nature and fast
Hormones travel via the bloodstream to target cells .broadcasts its hormonal messages to essentially all cells by secretion into blood and extracellular fluid requires a receiver to get the message cells bear a receptor
5 Hormones travel via the bloodstream to target cells •broadcasts its hormonal messages to essentially all cells •by secretion into blood and extracellular fluid. •requires a receiver to get the message – •cells bear a receptor