Programme 15: Responding to Stimuli

Activity Sheet 1

Programme Questions

Answer the questions whilst watching the video.

The Eye

1. How is the lens of your eye different from a camera lens?
2. The image on your retina is upside down. How do we see things the right way up?
3. What shape is the lens when focusing light from a nearby object?
4. How does the iris protect your eye?
5. Why can you not see the part of an image that falls on the blind spot?

The Nervous System

1. What is the central nervous system?
2. Can you list the events in a reflex arc?
3. What is a nerve impulse made of?

Plant Tropisms

1. What is the difference between tropism and movement?
2. Why do you not have to plant seeds the right way up?