GENERAL HISTOLOGY

Detailed explanation-1: -Stimulus: A detectable change happens in the environment. Receptors: The receptor convert environmental stimuli into electrical nerve signals. Neurons: The nerve signals are transferred to the central nervous system via neurons. Effectors: Effectors produce a response as a result of the stimulus.

Detailed explanation-2: -Environmental stimuli are things that happen in the environment that elicit a response or reaction from a person. For example, a drop in temperature may prompt some people to put on a coat or sweater. A loud thunder boom might elicit a startled jump.

Detailed explanation-3: -Receptors. Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus.

Detailed explanation-4: -This reaction is known as: A. Stimulus.

Detailed explanation-5: -The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.