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Homeostasis - Coggle Diagram
Homeostasis
Blood Glucose
Controlled for enzyme activity
The role of the liver
Glycogenesis = the conversion of glucose to glycogen
Glycogenolysis = the conversion of glycogen to glucose
Gluconeogenesis = the conversion of non-carbohydrates to glucose
The liver cell are target cells for insulin and glucagon
The secondary messenger model
Adrenaline and glucagon can't enter the cell to control blood glucose levels so they act through secondary messengers
Adrenaline
Adrenaline - the 1st messenger binds to specific receptors on target cell membranes and forms a hormone/receptor complex
The complex activate an enzyme, adenylate cyclase inside the membrane
The activated adenylate cyclase converts ATP to cyclic AMP
cAMP acts as the second messenger and activates another enzyme in the cytoplasm - a protein kinase - which causes the conversion of glycogen to glucose
Water
Controlled for blood water potential, enzyme activity and availability of glucose as a respiratory substrate
Temperature
Controlled for enzyme activity
Negative Feedback
A change in the set level
corrective measure
back to set level