Staying in balance Arrange the cards into a table listing the ways in which the body can gain or lose heat. Gain HeatLose Heat Describe how heat can be gained or retained by the body (Grade E) movement and exercise shivering vasoconstriction wearing extra clothing. sweating vasodilation removing extra clothing. releasing energy from food

What is homeostasis? The body uses so much energy, even during sleep, because it must maintain a constant internal environment. This process of keeping things the same is called homeostasis. A series of automatic control systems ensures that the body maintains a constant temperature, and steady levels of water, ions and blood sugar. Homeostasis allows the body’s cells to work at their optimum. Understand homeostasis involves balancing body inputs and outputs using automatic systems and why this occurs(Grade C)

The organs of homeostasis

Responding to change

Too hot…or too cold? Describe the effect of high and low temperatures on the body (Grade C) Using this animation give a definition of hyperthermia and hypothermia

MAINTAINING BLOOD SUGAR LEVELS

increase glucagon glucose liver insulin Pancreas Glucose loss Glucose gain

PLENARY WHAT ARE THE HORMONES INVOLVED IN BLOOD GLUCOSE REGULATION AND HOW DO THEY WORK? INSULIN; CONVERTS GLUCOSE INTO GLYCOGEN IF BLOOD GLUCOSE LEVELS ARE TOO HIGH. GLUCAGON; CONVERTS GLYCOGEN BACK INTO GLUCOSE IF BLOOD GLUCOSE LEVELS ARE TOO LOW.