What is a stimulus in an organism?

What is a stimulus in an organism?

In biology, we can define stimulus as the “detectable change (physical or chemical) in the environment of an organism that results in some functional activity”. For example, sunlight acts as a stimulus for plants that helps them grow or move towards it.

What is an internal stimulus?

Internal stimuli are changes to conditions inside the body, such as dangerous food in the stomach, viruses in the body, or lack of food or water.

What is stimulus theory?

Stimulus Response Theory is a concept in psychology that refers to the belief that behavior manifests as a result of the interplay between stimulus and response.

What is an example of an internal stimulus in plants?

For example, some hormones signal a plant to expand its root system in response to lack of water or nutrients. Internal stimuli cause responses to protect an animal and maintain homeostasis. Thirst and hunger are biological responses to lack of water and food.

What is stimulus in biology class 10?

A stimulus is any detectable change in the internal or external environment, capable of eliciting a response in the organism.

What are two stimulus examples?

A stimulus is anything that can trigger a physical or behavioral change. Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.

Which theory is also known as stimulus response theory?

conditioning. In conditioning. Stimulus-response (S-R) theories are central to the principles of conditioning. They are based on the assumption that human behaviour is learned. One of the early contributors to the field, American psychologist Edward L.

How is Stimulus Organism Response applicable to humans?

Stimulus Organism Response (S-O-R) Model As you may already have realised, the S-R model is applicable to humans, S-O-R model is like an update to the same and introduces the idea that the organism may choose to respond to the same stimulus in different ways depending upon its state of mind.

Which is an example of a stimulus in an animal?

The sight of another animal (particularly predators), which causes them to flee or fight, is an example of stimulation in animals. Animals’ instinctive reactions to stimuli account for the majority of their responses. When motivated by danger, an ostrich can sprint at speeds of up to 70 kilometres per hour.

What do you call the ability of an organism to detect stimuli?

The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity (excitability).

Can a stimulus be both internal and external?

A stimulus can also be external, meaning it occurs outside the organism. Both internal and external stimuli can cause a response, or resulting reaction, in an organism. A response can be behavioral or biological.