The hypothalamus and pituitary link the nervous and enocrine systems:
Cold temperature changes are detected by cells in the skin and relayed through the hypothalamus; HP relays signal to pituitary (releases TSH); TSH carried in the blood and acts on thyroid and releases the thyroid hormone;carried through the blood an acts on most cells;leads to increased heat production through metabolism
Maintained through the actions of the pancreas and liver
The control of blood glucose
Pancreatic cells monitor bg; Absorption of glucose from digestion in the intestine increases blood sugar/fasting reduces blood sugar; Glucoregulation is an example of negative feedback; Uses hormones, insulin, and glucagon.
If blood glucose is too high
Beta cells of pancreas produce insulin; insulin stimulates uptake of glucose cells (muscle);insulin stimulates liver/fat cells to store glucose as glycogen; leading to decrease in blood glucose.
If blood glucose is too low
Alpha cells of pancreas produce glucagon; glucagon stimulates liver to break glycogen into glucose; leads to increased blood sugar.
Reduced ability to control blood glucose through insulin
Type One Diabetes: Early Onset
Hereditary,weak relationship;Trigger needed (illness);Beta cells destroyed;insulin production stops
Type Two Diabetes:Adult Onset
Hereditary,strong relationship; Related to obesity and poor diet;Fewer insulin receptors in liver;less sensitivity to insulin,(insulin does not work as well)