Endocrine System Review Name_______________________________________________pd____________ 1. Hormonal Control of Blood Glucose Know how insulin, glucose, and glucagon affect each other Explain how blood sugar (glucose) is controlled by insulin and glucagon You do not need to include the role of glycogen Know the 2 ways/changes in hormones that increase blood glucose and the 2 ways that blood glucose is decreased 3 functions of the endocrine system 2. Hormone network—like the Robert Wadlow/HGH network DO NOT memorize the names of hormones regulating growth or the organs involved Be able to make a flow chart (arrows with + or -) connecting hormones in a feedback system when a table of hormones, sources, targets, and effects is given Analyze a flowchart of a hormone feedback system to determine the effects of changes or abnormalities in the system Practice Questions If blood glucose is low—what two hormone changes will increase the level of glucose/sugar in the blood? How/Why? If blood glucose is low, what would happen if insulin levels increased? If blood glucose is high, what two hormone changes will decrease the level of glucose/sugar in the blood? How/Why? If blood glucose is high, what would happen if glucagon levels increased? The graph below shows blood glucose levels over time. Draw in how insulin levels would look based on the amount of glucose in the blood. The drawing below represents a cell membrane with blood on the left and the inside of the cell on the right. If the blood glucose level remains high as it is on the left, show what will happen to the amount of water in the cell (with an arrow) and what symptoms that person would expect to have. glucose water Endocrine Feedback Systems 1. Use the information in the table to create a flow chart of how the thyroid hormone system is regulated. Hormone or Signal Chemical TSHRH TSHIH TSH Thyroid hormone Source Organ Hypothalamus hypothalamus Pituitary Thyroid gland Target Organ Pituitary pituitary Thyroid Gland Body tissues Hypothalamus Effect on Target Organ Increases TSH release Decreases TSH release Increase thyroid hormone release Increase metabolism Increase TSHIH release Network diagram 2. What is an example of a negative feedback loop in the thyroid hormone system? 3. Hyperthyroidism is a disease caused when too much thyroid hormone is released. List several possible defects that could cause too much thyroid hormone to be released.