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Construct your Interactive Notes
• Staple 6 pages of binder paper to the cover• On the cover, write• Chapter 9: Endocrine System• Name, Period, Seat #• A color picture
Endocrine System Overview (pg 2)
• The endocrine system produces hormones, which travel through the bloodstream and regulate body processes
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
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
Hormones
• A chemical substance that regulates the metabolic activity of other cells in the body
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
Types of Hormones
1. Proteins: Made of amino acids. Most common type of hormone
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
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
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.
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 membrane2. Activate protein synthesis3. Activate or deactivate enzymes4. Stimulate mitosis (cell division)5. Increase secretion
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
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
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
Endocrine challenge
Coloring worksheet (pg 3)
• Color the organs of the endocrine system
