PSL300H1 Study Guide - Final Guide: Extracellular Fluid, Adrenocorticotropic Hormone, Homeostasis

• School: UTSG
• Department: Physiology
• Course: PSL300H1
• Professor: Dr.Buchan, Dr.Kee, Dr.Tweed

Document Summary

Glucose enters the bloodstream causing an increase in blood glucose levels. Various mechanisms bring blood glucose levels back down to normal levels, the setpoint. This is an example of homeostasis, the (cid:271)ody"s te(cid:374)de(cid:374)(cid:272)y to (cid:373)ai(cid:374)tai(cid:374) relatively (cid:272)o(cid:374)sta(cid:374)t i(cid:374)ter(cid:374)al (cid:272)o(cid:374)ditio(cid:374)s. Hormones produced by the pancreas regulate blood glucose levels. When blood glucose levels are high, glucose molecules leave the blood and enter beta cells in the pancreas. The beta cells respond by releasing the hormone insulin. Insulin enters the bloodstream and is transported to cells all over the body. In the liver, insulin binds to receptors on liver cells. This causes the cells to take in more glucose. Inside the liver cells, glucose is converted to glycogen, a storage molecule. Blood glucose levels decrease as glucose is taken up by liver cells and other body cells. As a result, less and less insulin is released by the pancreas and blood glucose levels stabilize at their setpoint.