AP BIOLOGY

Detailed explanation-1: -A stimulus is a change in the external or internal environment that produces a physiological response. When applied to sensory receptors, it provokes behavior or response. Internal stimuli (such as changes in blood pressure) and external stimuli (tactile, sound, smell, taste, vision, etc.).

Detailed explanation-2: -Final answer: The reaction to a stimulus is called response.

Detailed explanation-3: -Explanation: Anything that causes an organism to react or respond is called a stimulus (plural: stimuli).

Detailed explanation-4: -A stimulus is anything that can trigger a physical or behavioral change. The plural of stimulus is stimuli. Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine.

Detailed explanation-5: -The response of an organism, usually a plant, to an environmental stimulus is called a tropism. Some common plant stimuli include light, gravity, water, movement of the sun, and touch. The naming of the tropism is associated with the stimulus.