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) Thyrotropins: thyroid

stimulating hormone (TSH)

Corticotropins: adrenocorticotrophin hormone (ACTH) & beta-endorphin

Lactotropins: prolactin (PRL)

Gonadotropins: luteinizing hormone (LH) & follicle stimulating hormone (FSH)

HormonesSomatropins: growth of the bodyThyrotropins: stimulates metabolismCorticotropins: stimulates secretion of

glucocorticoid steroid hormones from adrenal cortex cells

Lactotropins: maturation of mammary glands

Gonadotropins: regulates normal growth, sexual development, and reproductive function

Maintaining Homeostasis

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

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.

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

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

Corrections of the Pituitary GlandDepending 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.

Cited Sources http://www.innerbody.com/image/endo01.html http://users.rcn.com/jkimball.ma.ultranet/Biol

ogyPages/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-h

ormones-does-the-pituitary-gland-secrete