1. Construct your Interactive Notes
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Staple 6 pages of binder paper to the cover
On the cover, write
Chapter 9: Endocrine System
Name, Period, Seat #
A color picture

2. Endocrine System Overview (pg 2)
• The endocrine system produces hormones,
which travel through the bloodstream and
regulate body processes

3. Endocrine System Overview (pg 2)
• The endocrine system produces hormones,
which travel through the bloodstream and
regulate body processes
• The system consists of 8 glands scattered
throughout the body

4. Endocrine System Overview (pg 2)
• The endocrine system produces hormones,
which travel through the bloodstream and
regulate body processes
• The system consists of 8 glands scattered
throughout the body
• The only system in the body where the organs
that make up the system are not in physical
contact with one another

5. Hormones
• A chemical substance that regulates the
metabolic activity of other cells in the body

6. Hormones
• A chemical substance that regulates the
metabolic activity of other cells in the body
• Control many body processes, including
– growth and development
– maintaining water, electrolyte, and nutrient
balance in the blood
– Regulating cellular metabolism

7. Types of Hormones
1. Proteins: Made of amino acids. Most
common type of hormone

8. Types of Hormones
1. Proteins: Made of amino acids. Most
common type of hormone
2. Steroid Hormones: Made from cholesterol.
Includes sex hormones and hormones
produced by the adrenal cortex

9. Types of Hormones
1. Proteins: Made of amino acids. Most
common type of hormone
2. Steroid Hormones: Made from cholesterol.
Includes sex hormones and hormones
produced by the adrenal cortex
3. Prostaglandins: Made of lipids released from
cell membranes. Act locally

10. Hormone Action
• Because they circulate in the bloodstream,
hormones reach all organs in the body, but
they only affect cells that have receptors for
that particular hormone. These are called
target cells.

11. Hormone Action
• Because they circulate in the bloodstream,
hormones reach all organs in the body, but they
only affect cells that have receptors for that
particular hormone. These are called target cells.
• Hormones cause one or more of the following
changes in the target cells
1. Change the permeability of the plasma
membrane
2. Activate protein synthesis
3. Activate or deactivate enzymes
4. Stimulate mitosis (cell division)
5. Increase secretion

12. Control of Hormone Release
1. Hormonal stimuli: A gland is stimulated to
release hormone by another hormone. For
example, hormones from the hypothalamus
stimulate the pituitary gland

13. Control of Hormone Release
1. Hormonal stimuli: A gland is stimulated to
release hormone by another hormone. For
example, hormones from the hypothalamus
stimulate the pituitary gland
2. Humoral stimuli: Changing levels of ions or
nutrients in the blood stimulate hormone
release. For example, low blood calcium
levels stimulate release of parathyroid
hormone

14. Control of Hormone Release
1. Hormonal stimuli: A gland is stimulated to
release hormone by another hormone. For
example, hormones from the hypothalamus
stimulate the pituitary gland
2. Humoral stimuli: Changing levels of ions or
nutrients in the blood stimulate hormone
release. For example, low blood calcium levels
stimulate release of parathyroid hormone
3. Neural stimuli: Nerve fibers stimulate hormone
release. Occurs in the adrenal medulla

15. Endocrine challenge

16. Coloring worksheet (pg 3)
• Color the organs of the endocrine system