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Notes 34.1 The Endocrine System

Notes 34.1 The Endocrine System . How does the endocrine system help maintain homeostasis?. Endocrine System. The Endocrine system is a group of glands that release hormones into the bloodstream in order to help maintain homeostasis.

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Notes 34.1 The Endocrine System

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  1. Notes 34.1 The Endocrine System How does the endocrine system help maintain homeostasis?

  2. Endocrine System • The Endocrine system is a group of glands that release hormones into the bloodstream in order to help maintain homeostasis. • The effects of hormones are generally more gradual and longer lasting than those of the nervous system.

  3. Endocrine/Nervous System Analogy • An analogy is a way of comparing two things based on their being alike in some way. • Example: The firing of a neuron could be compared to the firing of a gun. • What do those two things have in common?

  4. Components of the Endocrine System • The endocrine system is made up of glands that release hormones into the blood and the hormones that carry messages throughout the body. • Examples: Adrenal gland releases adrenaline or epinephrine.

  5. Hormones • Chemical messengers that are released in one part of the body and affect cells in another part of the body.

  6. Target Cells • Cells that have a receptor for a particular hormone are called “target cells.”

  7. Target Cell Continued

  8. Endocrine and Exocrine • Endocrine glands release hormones in the bloodstream. • Example: Pituitary Gland • Exocrine glands release hormones into the digestive system or outside of the body. • Example: Sweat glands, Liver

  9. Prostaglandins • A Hormone-like substance, these modified fatty acids are released by a cell to affect other nearby cells. “Local Hormones”

  10. Hormones vs Local Hormones • Prostaglandins are short range communication while hormones can travel throughout the body.

  11. Steroid Hormone

  12. Non-Steroid Hormone

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