Given below are certain structures. Write against each their special functional activity.
1. Cochlea
2. Auditory nerve
3. Retina
4. Choroid
5. Sacculus
Answers
The cochlea is a hollow, spiral-shaped bone found in the inner ear that plays a key role in the sense of hearing and participates in the process of auditory transduction. Sound waves are transduced into electrical impulses that can be interpreted by the brain as individual frequencies of sound
The auditory nerve is a bundle of nerve fibers that carries hearing information between the cochlea the brain.
The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve. The purpose of the retina is to receive light that the lens has focused, convert the light into neural signals, and send these signals on to the brain for visual recognition
The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye, containing connective tissues, and lying between the retina and the sclera. The human choroid is thickest at the far extreme rear of the eye (at 0.2 mm), while in the outlying areas it narrows to 0.1 mm.
Explanation:
(1) Cochlea transforms the sound in neural message.
(2) The auditory nerve conveys the neuronal activity generated by the hair cells to the specialized nucleus of the thalamus.