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What affects a person's reaction time? Background: all living organisms are sensitive to the environment; this means they can detect changes in their environment these changes are known as stimuli. The parts of the body which detects the stimuli are called receptors. In animals there known as the sense organs: The nervous system collects information about changes inside or outside the body, decides how the body should respond and controls that response. Information is collected by receptor cells that are usually grouped together in sense organs, also known as receptors. Each type of receptor is sensitive to a different kind of change or stimulus. There are five different sense organs which are mentioned below: Sense Organ Sense Stimulus Skin Touch Pressure, pain, hot/cold temperatures. Tongue Taste Chemicals in food and drink. Nose Smell Chemicals in the air. Eyes Sight Light, movement Ears Hearing Balance Sound movement. The eye is an example as it's a receptor that detects light. The flow of the information from stimulus...

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