<prompt> In humans, the brain is considered to be responsive because?It has control centers for all motor actions and sensory inputsEvery cell of brain has got specific functionIt is a closed system and so not influenced by changes occurring outsideIts functions are profoundly affected by changes in external environment  <response>: Ans. d. Its functions are profoundly affected by changes in external environmentIn humans, the brain is considered to be responsive as its functions are profoundly affected by changes in external environment 