Question

give the defination of stimulus​

Answer 1

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1 : something that stirs or urges to action The reward was a stimulus for greater effort. 2 : an influence that acts usually from outside the body to partly change bodily activity (as by exciting a receptor or sense organ) Light, heat, and sound are common physical stimuli. stimulus. noun. stim·u·lus | \ ˈstim-yə-ləs .

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Answer 2

• A stimulus is a change in the physical or chemical structure of an organism's internal or external environment that an organism can sense. Sensitivity refers to an organism's or organ's capacity to perceive external stimuli and respond appropriately.
• Sensory receptors can receive information from both within and outside the body, as in touch receptors in the skin or light receptors in the eye, and from both inside and outside the body, as in chemoreceptors and mechanoreceptors.
• A stimulus can induce a response when it is perceived by a sensory receptor via stimulus transduction.
• A homeostatic control system's first component is frequently an internal stimulus.
• External stimuli, such as the fight-or-flight reaction, can trigger systemic responses throughout the body.