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Principles of Homeostasis

EXCESS

 

NORM

 

DEFICIENCY

Change detected by β-cells in pancreas

 

 

Change detected by α-cells in pancreas

Increase in insulin secretion
- Activates enzymes converting
glucose to glycogen
- Increases rate of glucose uptake

 

 

Increase in glucagon secretion
- Activates enzymes converting
glycogen to glucose

Levels return to norm

 

 

Levels return to norm

Fluctuating External Conditions

Negative Feedback Tends to Restore Systems to their Original Level

Temperature Control

DEFICIENCY/DROP IN CORE BODY TEMP BY DECREASING HEAT LOSS/INCREASING HEAT PRODUCTION

EXCESS/RISE IN CORE BODY TEMP BY INCREASING HEAT LOSS/REDUCING HEAT PRODUCTION

IMG 7-16-11

The Role of Temperature Receptors in the Skin

The Structure and Role of the Skin in Temp Regulation

Hypothermia

Control of Blood Glucose Concentration

The Factors which Influence Blood Glucose Concentration

The Pancreas

High Blood Glucose Concentration

Low Blood Glucose Concentration

Diabetes and its Control with Insulin and Manipulation of Carbohydrate Intake

Two Types of Diabetes Mellitus

Insulin Patches