Question

Have you experienced this? What happened immediately after the following actions? 

1. Light flashed suddenly into your eyes. 
2. Suddenly you felt a pinprick.
3. The leaves of the mimosa plant were touched. 
4. At sunset, lamps on the street or courtyard are lit and insects gather around the lamps.

Answer 1

Yes. These are examples of responses to stimuli:

1. Light flashed suddenly into your eyes: You blinked or closed your eyes immediately.
2. You suddenly felt a pinprick: You quickly moved your hand away.
3. The leaves of the mimosa plant were touched: The leaves folded or closed.
4. At sunset, lamps are lit: Insects gather around the lamps because they are attracted to light.