Question

A decrease in viscosity of the fluid in the semicircular canals may lead to a sense of motion even when the body is still. True/False

Answer 1

True

The vestibular organ of the inner ear is responsible for the sense of the balance which consists of semicircular canals and otoliths.The semicircular canals and otoliths are filled with the fluid called endolymph.The semicircular canal ends in the ampullae space contains small hair cells. During head movement in the plane of semicircular canal, the Inertia of the endolymph due to their viscosity results in the washing of cupula and the present hair cells deflect.Then the hair cells sends the information to the brain to sense the motion. When viscosity of the fluid decreases in semicircular canals, causes the loss of the viscosity resistance or Inertia results into sense of balance.Thus, leads to sense of motion even when body is still /head is not rotating.