AP BIOLOGY

Detailed explanation-1: -External stimuli come from outside an organism and influence the organism’s behavior. Temperature, sound, light, and other organisms act as external stimuli and cause different responses in organisms. Oxygen is an external stimuli required to sustain life.

Detailed explanation-2: -Stimuli triggers can be promoted from the inner or outer part of the body. The internal stimuli include pH, redox, hypoxia, and enzymes, and the external stimuli include light, temperature, AMF, and US (Rajendrakumar et al., 2018b).

Detailed explanation-3: -External stimuli are factors outside of the body that are taken in by receptors and will lead to a response. Examples of external stimuli include temperature changes, vision, hearing, tasting, smelling, and even sunlight for plants.

Detailed explanation-4: -The plural of stimulus is stimuli. 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.

Detailed explanation-5: -An external stimulus is a stimulus that originates from outside the organism. For example, light is an external stimulus. It originates from outside the body, but it produces an effect within the body.