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Afferent and efferent pathways
Communication between afferent and efferent neurons occurs in the form of electrochemical
signals
...
Afferent neurons
communicate with specialized interneurons, the opposite activity of direction or flow is
efferent
...

In the nervous system there is a closed loop system of sensation, decision, and reactions
...

A touch or painful stimulus, for example, creates a sensation in the brain only after
information about the stimulus travels there via afferent nerve pathways
...
Just outside the spinal cord, thousands of
afferent neuronal cell bodies are aggregated in a swelling in the dorsal root known as the
dorsal root ganglion
...
To maintain homeostasis, the controlled features
are body temperature, water content and blood sugar levels
...




If the blood sugar level increases, the pancreas detects this
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When blood sugar levels decrease, the pancreas detects it, releases glucagon which act on
the liver
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Positive and Negative
Using the example of a cut, the positive feedback would be the platelets increasing and
clotting the blood because they were triggered by enzymes
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The negative feedback of this would be
the brain sending out signals to reduces the platelets and avoid further problems, such as
deep vein thrombosis

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