Stimulus Response Nervous System
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Effectors are organs in the body that bring about a response to the stimulus.
Stimulus response nervous system. Sense organs contain groups of receptors that respond to specific stimuli. A change in the environment is the stimulus. For example the plants respond to sunlight by bending towards it.
Also both help to maintain homeostasis or a constant internal environment in animals. They detect a change in the environment stimulus. Excitabilityis the ability of a neuron to respond to the stimulus and convert it into a nerve impulse all of nothing rule the stimulus is either strong enough to start and impulse or nothing happens impulses are always the same strength along a given neuronand they are self propagation once it starts it continues to the end of the neuron in only one direction from dendrite to cell body to axon.
In the video the runner receives a stimulus of a starter pistol going off. If an animal with only 302 neurons which as in all other animals make up the most energetically costly tissue devotes 50 of a circuit to counter the effects of stimulus response connections in its nervous system then the implications of this discovery for the organization of behavior in animals generally cannot be underestimated. Co ordination involves processing all the information from receptors so that the body can produce a response that will benefit the whole organism.
In the nervous system this leads to an electrical impulse being made in response to the stimulus. The simplest type of response is a direct one to one stimulus response reaction. Receptors are groups of specialised cells.
Here is an example. In single celled organisms the response is the result of a property of the cell fluid called irritability. Form and function of nervous systems stimulus response coordination.
Stimulus such as heat light cold pressure smell touch water and force of gravity. In the nervous system this leads to an electrical impulse being made in response to the stimulus. Similarly a number of neurons act as sensors for the internal state of the body.
There Are Three General Classes Of Neurons Based On Function Which All Contain The Properties Of Excitability Nervous System Peripheral Nervous System Neurons
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