1 A badge or insignia consisting of stripes meeting at an angle, worn on the sleeve of a military or police uniform to indicate rank, merit, or length of service. 2  n. Heraldry A device shaped like an inverted V.  n.
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity.When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction.ne internal stimulus that causes hormone release is blood pressure. Hypotension, or low blood pressure, is a large driving force for the release of vasopressin, a hormone which causes the retention of water in the kidneys.
Stimulus and Response in Plants and Animals. Extracts from this document... Topic: Response of plants and animals Stimulus and Response Plants and animals receive information about changes in conditions both inside and outside their bodies. Any information to which an organism reacts is known as a stimulus because it stimulates the organism to make a response. A stimulus could be an external event, e.g. change in the direction of light, change in light intensity or change in temperature.