Using relevant example, describe/ explain simple and conditioned reflex action.

-Simple reflex actions e.g. withdrawal of finger from a hot or sharp object; is an automatic response to a specific stimulus; When a finger touches a sharp/hot object, the stimulus/ heat/ pain is detected by temperature/ thermoreceptors/ pain receptors in the skin/ dermis; An impulse is generated; which is transmitted along the sensory neurone; to the grey matter/ central nervous system/ spinal cord; The chemical transmission of impulse is done across a synapse to relay neurone; and through another synapse; to motor neurone; and across another synapse; to muscles/ effectors/ biceps muscles; the biceps muscles contract and the hand is withdrawn;
-Conditional reflex actions e.g. salivation of a dog/humans/students in response to sound; is an automatic response evoked from an animal by unrelated stimulus, substituted for the one which normally elicits the response; It develops from past experience; and involves modification of behaviour/learning; It weakens with time; and must be reinforced by repeating the related original/primary stimulus; Dogs/Students salivate when the bell for meals rings because they have learned to associate the ringing of the bell at meal time with food; every time it rings, they are offered food;