What is meant by stimulus and reaction?
Stimulus is the change in the environment or environmental factors to to which the organism can respond or react. Theresponse shown by organisms towards or awaya stimulus is called reaction.
What is the function of the sensory neuron and motor neuron in a reflex action?
The function of sensory neurons is to carry message from receptor organ to the spinal cord.
The function of motor neuron is to carry message from the spinal cord to the effector organs.