What is the process of detecting stimuli in the environment called?
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How does the nervous system help us respond?Survival of an organism depends on its ability to respond to changes in the environment. The nervous system allows fast-acting but short-lived responses. Organisms need to detect and respond to changes in their internal and external environment. This is because the conditions inside our
body must be carefully controlled for it to function effectively and survive. The control systems that allow organisms to respond to changes are incredibly important. All control systems include: The nervous system allows an organism to respond quickly to changes in the internal or external environment. The responses to the stimuli are short-lasting. 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. Sense organs
contain groups of receptors that respond to specific stimuli. Effectors include muscles and glands - that produce a specific response to a detected stimulus. For example:
Receptors are connected to effectors as follows:
GCSE Subjects
What is the process of detecting stimuli in the environment?Sensation is the process of detecting external stimuli and changing those stimuli into nervous system activity.
What is the ability to detect stimuli called?The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity (excitability).
What is detecting a stimulus?
What detects information from the environment?Through its receptors, the nervous system keeps us in touch with our environment, both external and internal. Like other systems in the body, the nervous system is composed of organs, principally the brain, spinal cord, nerves, and ganglia.
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