Question

A gymnast is able to balance his body upside down even in the total darkness because of
A.Tectorial membrane.
B.Organ of corti.
C.Cochlea.
D.Vestibular apparatus.

Answer 1

In biomechanics, balance is an ability to maintain the line of gravity of a body with base support with a minimal posture. Sway is the movement of the body horizontally to the center of gravity even when a person is standing ideally.

Complete step by step answer:
Tectorial membrane- This membrane is one of the two acellular membranes in the inner ear of the cochlea, the other is the basal membrane (BM). Tectorial means forming a cover. The tectorial membrane (TM) is situated above the spiral limbus and the Corti which is a spiral organ and extends along the length of the cochlea parallel to the BM longitudinally.
Organ of Corti- The main function of the organ of Corti is to transduce the auditory signals. Sound waves enter through the auditory canal and will cause a vibration of the tympanic membrane.
Cochlea- This organ contains the spiral organ of Corti, which is the receptor organ for hearing. This organ has many tiny hair cells that translate the vibration of sound from the surrounding ducts into electrical impulses which are then carried to the brain by the sensory nerve.
Vestibular apparatus- This system is known as the sensory apparatus which is in the inner ear that helps the body to maintain the posture equilibrium. The information which is received by the vestibular system is essential for the coordination of the body position like the head and the movement of the eyes.

Hence the correct answer is option D, Vestibular apparatus.

Below is the picture of a vestibular apparatus.

Note:
The vestibular system comprises three semicircular canals and the otolith (macula being the sensory part of the utricle and saccule). Each semicircular canal is present in the perilymph of the bony canals.