Staying in balanceArrange the cards into a table listing the ways in which the

body can gain or lose heat.

Gain Heat Lose 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

PancreasGlucose

lossGlucose

gain

PLENARYWHAT 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.