When external stimuli affects an organism's nervous system, it transports the information in the form of action potentials, and then the brain processes and perceives it. External stimuli come in a variety of formats. As... More »

Animals respond to stimuli by freezing in place, running away, or in the case of a change in environment, by exploring the new surroundings. Certain behaviors, such as mating or nesting, are responses to pheromone stimul... More »

Plants respond to stimuli either through growth or through movement without growth. These movements or growth can either be based on the direction from which the stimulus comes or they can be independent of the direction... More »

If both organisms in a symbiotic relationship are executing an action, then one organism's actions benefit the other organism in the dynamic. The name for this type of symbiotic relationship is mutualism. More »

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Dendrites receive information from neurons in the form of action potentials. These small structures are found at the end of neurons next to the axon. More »

Extraneous stimuli is an action or thought stemming from outside someone's focus and has no relevance to the person's current task. Those who suffer from Attention Deficit Hyperactivity Disorder (ADHD) are often plagued ... More »

Behavioral adaptation is the process by which an organism or a species changes its pattern of action to better suit its environment. It is contrasted with structural adaptation, which is the appearance of physical featur... More »