Name: Living Organisms Characteristics
Uploaded: 2019-07-19
Duration: 2 min 29 s
Description: What are the characteristics of a living organism? Movement, reproduction, sensitivity and growth. Do you want to learn more? Watch this video!

Question

In each of the examples given, what is the stimulus and what is the response?
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.

Accepted Answer

In the examples given, the stimulus and response are as follows:
1. The sudden flashing of light into the eyes is the stimulus. The constriction of the pupil is the response towards the light stimulus.

2. The pinprick is the stimulus. The spinal cord processes the impulses to generate a response due to which we quickly withdraw our hands.

3. The touch is the stimulus. The transfer of water from the vacuoles to the adjacent cells leading to the closure of leaves is the response.

4. The light from the lamps is the stimulus. The navigation of insects around the lamp is the response.

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