chapter 17

Nerve impulses for the sense of hearing are initiated in the spinal organ (organ of Corti) and then travel through the ____ to the cochlear nuclei in the ______

cochelear branch of cranial nerve VIII; medulla oblingata

The _____ regulates the amount of light entering the eyeball through the pupil

iris

In the olfactory pathway, axons of the mitral cells form the ____. The axons project to the _____.

olfactory tract; cerebral cortex and limbic system

olfactory epithelium is found

only in the superior portion of the nasal cavity

What is the actual site of hearing ?

organ of corti

Structure in the inner ear that send impulses for balance and equilibrium

semicircular canals

Which of the following is NOT considered a special sense ?

talk

Special senses allow the body to react to the environment ?

true

What ear structure vibrates back and forth when sound waves strike?

tympanic membrane

Which of the following nerves conducts impulses associated with the sense of gustation ?

vagus, facial, glossopharyngeal

Which structures are associated with equilibrium? Select all that apply

vestibule saccule semicircular ducts ampullae

What lies between the lens and the retina?

vitreous chamber

How many extrinsic eye muscles are responsible for moving each eye?

6

Provide for the sense of taste

Gustatory cells

What cranial nerves are associated with olfactory glands ? select all that apply

Olfactory and facial

The layer in the eye that contains the photoreceptors (cones and rods) is the:

Retina

Which statement accurately describes the changes in the membrane potential of a photoreceptor cell when light rays strike its photopigments ?

The photoreceptor cell undergoes hyperpolarization.

This portion of the ear is responsible for directing sound waves into the eardrum.

a. Outer Ear

The first step in the visual transduction process that occurs in the retina is

absorption of light by photopigments