D1: Homeostasis — E level

Copy this text into your book:

Your body has receptors that can sense the environment. They let your body adjust to changes in its environment.

There are 4 main kinds of receptor:

• Thermoreceptor - senses temperature
• Photoreceptor - senses light
• Chemoreceptor - senses chemicals
• Mechanoreceptor - senses pressure or position

Copy a diagram showing sensory receptors in the skin. See page 47 of your Good Science textbook, or a diagram that your teacher provides.