Question

Trace the sequence of events when bright light is focussed in your eyes

Answer 1

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Path : Light passes from the cornea to the pupil, the dark circle in the center of the iris, which is the colored portion of the eye. The pupil regulates the amount of light that will enter the inner eye based on environmental conditions

It dilates, growing bigger to receive more light under dim lighting conditions, and shrinks in response to bright light. This response is quicker in young individuals and tends to slow with increasing age.


In short the path is = Receptor —> Sensory neuron —> Brain —> Motor neuron —> Eye —> Eye muscle contracts.

Answer 2

Answer:

When the bright light is focused on your lights the photoreceptors generate electrical impulses and send it to the sensory neurons

they carry the stimuli to the spinal cord which transports the message to the brain

the brain revert back the message by the motor neurons which contract the Pupil.

The sequence of events which occur is as follows:-

Receptors ->sensory neurons -> brain ->motor neurons ->eye muscles-> pupil