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The Endocrine System VS 223 Dr. Noland Endocrine Glands Secrete their product directly into bloodstream Known as “ductless” glands.

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Presentation on theme: "The Endocrine System VS 223 Dr. Noland Endocrine Glands Secrete their product directly into bloodstream Known as “ductless” glands."— Presentation transcript:

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3 The Endocrine System VS 223 Dr. Noland

4 Endocrine Glands Secrete their product directly into bloodstream Known as “ductless” glands

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6 Hormones Act on target organs due to specific receptors located on the target plasma membrane

7 Neuroendocrine Reflex Nerve input on the afferent end Hormonal input on the efferent end Suckling reflex Induced ovulation in cats, rabbits

8 Endocrine Glands Discrete gland - Adrenal gland Organ – Duodenum Combo of Exocrine/Endocrine - Pancreas

9 Classification of Hormones Peptides – chains of amino acids –Most hormones Amines – tyrosine derivatives –Catecholamines, T4 Steroids – cholesterol derivatives –Gonadal hormones and adrenal cortical hormones

10 Mechanisms of Action Hormones circulate in the bloodstream and bind with target organ cell receptors to affect a change in the target cell

11 Hydrophilic Hormones Peptides and Catecholamines

12 Lipophilic Hormones Steroids and Thyroid

13 Hormonal Action

14 Feedback Regulation


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