Question

Select the incorrect statement-
1) Endolymph is present in scala
media of cochlea.
2) Organ of Corti' has a sensory
tectorial membrane.
3) Tympanum is the site of conver-
sion of sound waves into mechanicalenergy.
4) The rods are totally absent in blindspot and macula lutea.​

Answer 1

1 st one is incorrect..

Answer 2

Answer:

The 4th statement is the incorrect statement. The rods are not totally absent in macula lutea.

Explanation:

1. Cochlea consists of cochlear fluids. Endolymph is one of the constituents of this fluid. It is present in the scala media of the cochlea and has a unique composition with high potassium levels and low sodium and calcium levels.

2. The Organ of Corti has hair cells on its surface that possesses stereocilia. It is attached to the tectorial membrane. The tectorial membrane is sensitive as it activates the receptors in the hair cells via the stereocilia whenever air passes above it.

3. The ear produces the message of any sound by converting it into mechanical energy. The eardrum or tympanum is the site where the sound waves are converted into mechanical vibrations.

4. Blindspot is an area in the eye that is insensitive to light. This insensitiveness occurs because there are no rods or cones present in the blind spot. Contrasting to the blind spot, the macula is the region of the eye that produces very sharp images. It is the center portion of the retina. It consists of rods and a high number of cones.