Exam 21: Special Senses

In bright light, impulses from sympathetic neurons cause a constriction of the pupil due to contraction of the radial muscle fibers of the iris.

Which of the following statements about the cornea is TRUE?

A layer of dense connective tissue that covers the entire eyeball except the cornea is called _____.

The facial (VII) nerve and vestibulocochlear (VIII) nerve both travel through the facial canal of the petrous portion of the temporal bone. A tumor located in this canal will potentially interfere with the special sense(s) of:

The bony labyrinth contains perilymph; the membranous labyrinth contains endolymph.

Large papillae that always contain taste buds and that are found in a V-shaped row on the posterior region of the tongue are called vallate (circumvallate) papillae.

In the wall of the utricle and saccule, the gelatinous layer of the macula that rests on the hair cells contains calcium carbonate crystals called _____.

The structure indicated by the arrow is _____

The vitreous body:

The first-order neurons of the olfactory pathway are bipolar neurons called olfactory receptor cells.

The cranial nerves containing neurons of the gustatory pathway are: 1) facial (VII) nerve 2) vagus (X) nerve 3) glossopharyngeal (IX) nerve 4) trigeminal (V) nerve 5) abducens (VI) nerve

Olfactory receptors, which are specialized neurons, are replaced regularly by the basal cells of the olfactory epithelium.

Define the two kinds of equilibrium and name and describe the receptors for each.

The structure indicated by the arrow is _____

Which of the following types of cells is the first to receive a light ray as it travels through the retina?

The structure indicated by the arrow is _____

Olfactory receptor cells are unipolar neurons.

Summarize the events that occur as sound waves enter the external ear and are transmitted through the middle and inner ears to produce sensations of hearing. Accompany your summary with labeled sketches that illustrate the anatomical features in your answer.

Obstruction or blockage of the nasolacrimal duct will prevent drainage of tears into the:

The structure indicated by the arrow is _____