1. Take out a sheet of paper for notes. This will be page 31
1/25
Take out the chapter 16 questions that were assigned. I will be stamping them
As long as you answered #1-4
Take out a sheet of paper for notes. This will be page 31
Targets will be page 29

2. The Endocrine System 16

3. Endocrine System: Overview
Endocrine system – the body’s second controlling system which influences the metabolism of cells by using hormones
Hormones are secreted by the Endocrine glands
Continued on the next slide

4. Endocrine System: Overview (cont)
The hypothalamus has both nervous functions and releases hormones
Other tissues and organs that produce hormones include adipose cells, and cells of the: small intestine; stomach; kidneys; and heart

5. Hormones – chemicals secreted by cells of endocrine glands
Messengers that regulate the metabolic function of other cells
Carried by the bloodstream

6. Target Cell Specificity
Hormones circulate to all tissues but only activate with very specific target cells
Target cells must have specific receptors to which the hormone binds
These receptors may be intracellular or located on the plasma membrane

7. Amino acid based (proteins)
Types of Hormones
Amino acid based (proteins)
– most hormones belong to this class
Steroids
– gonadal and adrenocortical hormones
- lipid (cholesterol) based
PLAY
InterActive Physiology®: Endocrine System: Orientation