1 / 7

Endocrine system

Endocrine system. Human Systems Biology. Hormones “ Chemical Messengers”. Produced and secreted directly into the blood by endocrine glands Endocrine gland hormones are spread by blood stream throughout body to target organs (each hormone has a specific target)

viveca
Download Presentation

Endocrine system

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Endocrine system Human Systems Biology

  2. Hormones “Chemical Messengers” • Produced and secreted directly into the blood by endocrine glands • Endocrine gland hormones are spread by blood stream throughout body to target organs (each hormone has a specific target) • Target organs have hormone-receptor proteins that bind to hormones that arrive in blood • Neurotransmitters are different because they send signals between cells

  3. Page 65 • The main glands in the Endocrine system are: • Pituitary Gland • Thyroid Gland • Parathyroid Glands • Adrenal Glands • Pancreas • Ovaries • Testes Refer to page 65, write a brief function for each gland!

  4. Types of Glands Exocrine Glands Endocrine Glands • Have ducts • Secrete products into body cavities • E.g. salivary glands secrete salivary amylase enzyme into mouth via salivary ducts • No ducts! • Secrete hormones directly into bloodstream • E.g. • Hypothalamus • pituitary • thyroid • pancreas

  5. Salivary Gland Duct

  6. Control of Endocrine Glands Endocrine glands are controlled by a “cause and effect” feedback system with inputs (reactants) and outputs (products). This is what maintains “Homeostasis” (balance) Negative Feedback Positive Feedback • If the feed back output opposes the input • Pancreas: See page 66 about blood glucose. • Kidney: See page 64 about ADH. • If the output (i.e. hormone) fed back is increasing the input

More Related