Ap 2

Taste buds are found on

all of these choices

Which darkly pigmented structure reduces light reflection within the eyeballs?

choroid

Which of the following molecules is capable of detecting light rays that strike the photopigments in the retina?

cis-retinal

Nerve impulses for the sense of hearing are initiated in the spiral organ (organ of Corti) and then travel through the _____ to the _____.

cochlear branch of cranial nerve VIII; medulla oblongata

Which of the types of receptors listed below is primarily used for detecting light rays under bright light conditions?

cones

This is a thin mucous membrane that protects the inner aspect of the eyelids and the portion of the sclera covering the anterior surface of the eyeball.

conjunctiva

Which of the following is the transparent layer on the anterior of the eyeball through which the iris can be observed?

cornea

Which sensory structure in the inner ear is capable of sensing rapid rotation of your head to the left?

crista of a semicircular duct

The lens is made of layers of proteins called

crystallins

From which of the following layers of the developing embryo do the eyes develop?

ectoderm

Which of the following types of papillae do NOT contain taste buds?

filiform

These receptor cells provide for the sense of taste.

gustatory cells

During embryonic development, the first portion of the ear to develop is the

internal ear

Dark adaptation ________.

involves accumulation of rhodopsin

Which structure regulates the amount of light entering the eyeball through the pupil?

iris

The tarsal plate of the eyelid

is connected to the levator palpebrae

The axons of the ganglion neurons of the retina terminate in the

lateral geniculate nucleus of the thalamus

During embryonic development, the lens of the eye develops directly from an invagination of the lens placodes called the

lens vesicle

Cataract leads to blindness due to

loss of transparency of the lens

Which of the following structures contains otoliths (ear stones)?

macula of the saccule

Which of the following are structures of the membranous labyrinth of the inner that are involved in dynamic and static equilibrium?

more than one of these is correct

The vestibular nuclei of the brainstem that control equilibrium receives sensory information from all the following areas EXCEPT the

nociceptors in the distal limbs

Adaptation of the olfactory sense to the continued presentation of an odorant

occurs rapidly

The smell receptors that actually bind the odorants and begin signal transduction are located on

olfactory hairs

Olfactory receptors are found

only in the superior portion of the nasal cavity

Which of the structures listed below converts vibrations in the endolymph into action potentials?

organ of corti

As sound levels increase in the spiral organ (of Corti), ________.

outer hair cells stiffen the basilar membrane

Which of the following is the space between the upper and lower eyelids?

palpebral fissure

During embryonic development, the external ear develops from a structure called the first

pharyngeal cleft

During embryonic development, the middle ear develops from a structure called the first

pharyngeal pouch

Which is NOT considered an accessory structure of the eye?

retina

Which layer of dense connective tissue serves to protect the inner parts of the eyeball?

sclera

Which of the following structures senses change in rotational acceleration of the head in order to help maintain dynamic equilibrium?

semicircular canals

Infection of a sebaceous ciliary gland can result in

sty

Olfactory cells and taste buds are normally stimulated by ________.

substances in solution

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

tympanic membrane

Which of the following structures carries action potentials generated by sound transduction?

vestibulocochlear nerve

What lies between the lens and the retina?

vitreous chamber

How many days after fertilization do the ears begin to develop?

22

How many days after fertilization do the eyes begin to develop?

22

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

6

Select the correct statement about equilibrium.

Cristae respond to angular acceleration and deceleration.

Binocular vision

Gives better depth perception.

Which is the correct order in the flow of tears?

Lacrimal gland, lacrimal duct, superior or inferior lacrimal canal, lacrimal sac, nasolacrimal duct, nasal cavity.

Presbycusis refers to age-associated

Progressive loss of hearing in both ears.

The olfactory tract

Projects directly to the primary olfactory cortex and to the limbic system and hypothalamus.

Select the correct statement about olfaction.

Some of the sensation of olfaction is actually one of pain.

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

The photoreceptor cell undergoes hyperpolarization.

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

Vagus

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

absorption of light by photopigments