State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.
(a) Deafness is caused due to rupturing of the pinna. (T/F)
(b) Semicircular canals are concerned with static (positional) balance. (T/F)
(a) False - Deafness is caused due to rupturing of the eardrum.
Explanation: A hole or rupture in the eardrum, a thin membrane that separates the ear canal and the middle ear, is called a perforated eardrum. The medical term for eardrum is a tympanic membrane. The middle ear is connected to the nose by the Eustachian tube, which equalizes pressure in the middle ear. A perforated eardrum is often accompanied by decreased hearing and sometimes liquid discharge. The perforation may be accompanied by pain if it is caused by an injury or becomes infected.
(b) False - Semicircular canals are concerned with dynamic balance.
Explanation: The semicircular canals are part of the inner ear. They are lined with cilia and filled with a liquid substance, known as endolymph. Every time the head moves, the endolymph moves the cilia. This works as a type of motion sensor, as the movements of the cilia are communicated to the brain.
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