Sense Organs

Photoreceptor cells

________ are not present in that region and hence it is called the blind spot.

Light induces

________ dissociation of the retinal from opsin resulting in changes in the structure of the opsin.

inner ear

The ________ also contains a complex system called vestibular apparatus, located above the cochlea.

optic nerves

The ________ leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eyeball.

waves

The ________ in the lymph induce a ripple in the basilar membrane.

adult human eyeball

The ________ is nearly a spherical structure.

membranous canals

The ________ are suspended in the perilymph of the bony canals.

olfactory epithelium

The neurons of the ________ extend from the outside environment directly into a pair of broad bean- sized organs, called the olfactory bulbs, which are extensions of the brains limbic system.

external ear

The ________ receives sound waves and directs them to the ear drum.

vestibular apparatus

The ________ is composed of three semi- circular canals and the otolith (the macula is the sensory part of the saccule and utricle)

inner ear

The fluid- filled ________ called labyrinth consists of two parts, the bony and the membranous labyrinths.

Eustachian tube

A(n) ________ connects the middle ear cavity with the pharynx.

external auditory meatus

The outer ear consists of the pinna and ________ (canal)

The inner layer is the retina and it contains three layers of neural cells

from inside to outside -