Response to Stimuli

Response to stimuli is the way living organisms react to changes in their environment. This response allows them to adapt and survive in their surroundings. Stimuli can be internal or external, and the response can be immediate or delayed.

Types of Stimuli

There are different types of stimuli that organisms can respond to:

• Internal stimuli: These are changes that occur within the organism's body, such as hunger, thirst, and pain.
• External stimuli: These are changes that occur in the organism's external environment, such as light, temperature, sound, and touch.

Examples of Response to Stimuli

Here are some examples of how organisms respond to stimuli:

• Plants: Plants respond to light by bending towards it (phototropism) and respond to gravity by growing roots downward (gravitropism).
• Animals: Animals respond to danger by fleeing (fight or flight response) and respond to changes in temperature by shivering or panting to maintain their body temperature.

Study Guide

Here are some key points to remember about response to stimuli:

1. Define response to stimuli and give examples of internal and external stimuli.
2. Explain how plants and animals respond to specific stimuli, such as light, gravity, and danger.
3. Discuss the importance of response to stimuli for the survival of living organisms.
4. Compare and contrast the responses of different organisms to the same stimuli.
5. Identify and describe different types of stimuli that can affect organisms in their environment.

Remember to observe and analyze how different organisms respond to stimuli in the world around you. This will help you understand the importance of this process for the survival and adaptation of living organisms.

Good luck with your studies!