The Endocrine System
Topics: Endocrine system, Hypothalamus, Thyroid / Pages: 5 (1068 words) / Published: Feb 24th, 2014

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CHAPTER 18
ENDOCRINE SYSTEM

Identify the endocrine glands and their hormones.
 Gain an understanding of the functions of these hormones in the body.
 Analyze medical terms related to the endocrine glands and their hormones.
 Identify abnormal conditions resulting from excessive and deficient secretions of the endocrine glands.
 Describe laboratory tests and clinical procedures related to endocrinology, and recognize relevant abbreviations.  Apply your new knowledge to understanding medical terms in their proper contexts, such as medical reports and records.


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INTRODUCTION
ENDOCRINE SYSTEM
Glands release hormones.
 Hormones regulate the many and varied functions of an organism.
 Hormones bind to receptors.
 Receptors are recognition sites in the various target tissues on which hormones act.


INTRODUCTION
ENDOCRINE SYSTEM




ENDOCRINE glands—
Secrete their hormones directly into the bloodstream EXOCRINE glands—
Send chemical substances (tears, sweat, milk, saliva) via ducts to the outside of the body 2

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ENDOCRINE GLANDS thyroid gland
 parathyroid glands (four glands)
 adrenal glands (one pair)
 pancreas (islets of Langerhans)
 pituitary gland
 ovaries (one pair)
 testes (one pair)
 pineal gland
 thymus gland




How are endocrine glands different from exocrine glands?

THE ENDOCRINE SYSTEM

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THYROID GLAND

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THYROID FUNCTION


There are two hormones:



thyroxine or tetraiodothyronine (T4) triiodothyronine (T3).

Thyroid hormones aid cells in their uptake of oxygen and regulate metabolic rate.
 Calcitonin: stimulates calcium to leave the blood and enter the bone.




What are some of the hormones secreted by the thyroid gland?

THYROID GLAND: HORMONES

AND

ACTIONS

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PARATHYROID GLAND

PARATHYROID GLANDS

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PARATHYROID FUNCTION

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