The hypothalamicâpituitaryâthyroid axis (HPT axis for short, aka thyroid homeostasis or thyrotropic feedback control) is part of the neuroendocrine system responsible for the regulation of metabolism. As its name suggests, it depends upon the hypothalamus, the pituitary gland, and the thyroid gland.The hypothalamus senses low circulating levels of thyroid hormone (Triiodothyronine (T3) and Thyroxine (T4)) and responds by releasing thyrotropin-releasing hormone (TRH).he TRH stimulates the pituitary to produce thyroid-stimulating hormone (TSH). The TSH, in turn, stimulates the thyroid to produce thyroid hormone until levels in the blood return to normal.
Average Shipping weight of Media. Average weight of a: DVD weighs an average of 4 oz. Xbox 360 video game or a PS3 Game (COMPLETE) weighs an average of 5 oz. Same for a Wii Game. A complete CD weighs an average of 4 oz. Variables: A 2 Disc DVD set, weighs an average of 5 oz . If either of these items has a Cardboard Sleeve, add 1 oz to the weight. *Most of these items actually weigh less that 4.5 oz. but you have to round up if it exceeds an ounce, for shipping purposes. I will do a post for books next.
The LexanÂ® refreshment center door will hold up to 75 pounds. All other shelves are designed to hold up to 50 lbs. An example of the weight of an average refrigerator item would be a gallon container. It weighs 8 pounds, and a full width shelf can hold 6 of them.A quart container weighs 2 pounds, and a full width shelf can hold 24.The Porta-Bins, Quick-Store bins, and door shelves have no specific limitations.efrigerator Shelf Weight Limitations. GE and Hotpoint refrigerator cantilever shelves, those that only have rear supports, are tested for 35 pounds per square foot. 1  These shelves should not exceed 50 pounds total weight for full width shelves and 25 pounds for half width shelves.