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 rigidity causes the parcel rate to be used instead of the Large Envelope rate,. You MIGHT be able to use the Large Envelope rate for some of these. The weight includes one CD or DVD, the case, and the package. It does not include a printed paper insert for the DVD case or jewel case.The total cost does NOT include CD/DVD, ink to print on the CD, or the paper for the printed insert.If you are shipping a movie in its DVD case or a music album in its jewel case, expect some extra weight from the printed material.he CD or DVD itself is most of the one ounce solution, weighing 0.58oz. I use the white printable CDs if I want a nice label. That is the only type I buy anymore, as they are now inexpensive. Paper labels are not advisable for long term reliability, and add to the cost and weight.