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The Pituitary Gland: Anterior Lobe

The Pituitary Gland: Anterior Lobe. Nikki Goodwin & Bailey Bench . Location. It is the front third of the pituitary gland, located in brain. It is a protrusion off the bottom of the hypothalamus and is connected through the infundibulum. . Hormones. Somatotropins : human growth hormone (HGH)

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The Pituitary Gland: Anterior Lobe

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  1. The Pituitary Gland: Anterior Lobe Nikki Goodwin & Bailey Bench

  2. Location • It is the front third of the pituitary gland, located in brain. • It is a protrusion off the bottom of the hypothalamus and is connected through the infundibulum.

  3. Hormones • Somatotropins: human growth hormone (HGH) • Thyrotropins: thyroid stimulating hormone (TSH) • Corticotropins: adrenocorticotrophin hormone (ACTH) & beta-endorphin • Lactotropins: prolactin (PRL) • Gonadotropins: luteinizing hormone (LH) & follicle stimulating hormone (FSH)

  4. Hormones • Somatropins: growth of the body • Thyrotropins: stimulates metabolism • Corticotropins: stimulates secretion of glucocorticoid steroid hormones from adrenal cortex cells • Lactotropins: maturation of mammary glands • Gonadotropins: regulates normal growth, sexual development, and reproductive function

  5. Maintaining Homeostasis • The pituitary gland releases hormones throughout the body when they are needed to maintain homeostasis.

  6. Feedback Mechanisms & Antagonistic Hormones • The release of most hormones is controlled using negative feedback mechanisms. The hypothalamus detects changes in the body through the peripheral nervous system and senses the change needs to be fixed. Then it sends a message to the pituitary to release the hormone that fixes the problem.

  7. Releasing & Release-Inhibiting Hormones • Releasing: contains six secretory cells that release their hormones in response to hormones reaching them from the hypothalamus • Release-Inhibiting: inhibits the release of hormones -growth hormone inhibiting hormone -prolactin inhibiting hormone

  8. Failure of the Pituitary Gland • Since it is the control for other glands in the body, it can stimulate or inhibit the release of hormones in other glands, like the adrenal glands, thyroid glands, or sex organs. • Can also cause gigantism or dwarfism

  9. Corrections of the Pituitary Gland • Depending on the cause there are many different treatments. • Injections or medication can be taken to replace hormones that were not secreted by the pituitary gland.

  10. Cited Sources • http://www.innerbody.com/image/endo01.html • http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Pituitary.html • http://www.sciencedaily.com/articles/a/anterior_pituitary.htm • http://homepage.smc.edu/wissmann_paul/intranetstuff/dept/scienceLRC/wissmann_site/pituitary.htm • http://pituitary.ucla.edu/body.cfm?id=47 • http://www.reference.com/motif/health/what-hormones-does-the-pituitary-gland-secrete

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