Deck 9: Sensory Organs: Vision and Hearing

Question 1

During rotational movement, the _____ is moved by endolymph, causing hair cell displacement and resulting in either the propagation or inhibition of an action potential, depending upon the direction of the movement

A) Cupula
B) Kinocilium
C) Saccule
D) Stereocilia
E) Utricle

Answer 1

A

Question 2

In the dark, Na+ channels are ____ and neurotransmitter release is ____. In bright light, on the other hand, the Na+ channels are ____ and neurotransmitter release ____

A) Closed, continuous, open, ceases
B) Closed, continuous, open, increases
C) Open, absent, closed, increases
D) Open, continuous, closed, ceases
E) Open, continuous, closed, increases

Answer 2

D

Question 3

Most of the aqueous humor produced by the ciliary body drains into the

A) Aqueous veins
B) Canal of Schlemm
C) External collecting channel
D) Scleral plexus
E) Trabecular meshwork

Answer 3

B

Question 4

Which of the following components prevents the aqueous humor from infiltrating the cornea?

A) Bowman's layer
B) Corneal endothelium
C) Corneal epithelium
D) Descemet's membrane
E) Stroma

Question 5

The muscle responsible for accommodation is found in the

A) Cornea
B) Inner tunica
C) Retina
D) Sclera
E) Uvea

Question 6

As the distance between the eye and the object on which it is focusing decreases to less than approximately 20 feet, the _____ contracts, resulting in a more rounded and convex lens

A) Ciliary muscle
B) Iris
C) Optic disc
D) Suspensory ligament
E) Zonula fibers

Question 7

The basal laminae of the retinal epithelium and underlying choriocapillaris endothelium as well as layers of collagen and elastic fibers make up the _____ of the choroid

A) Bruch's membrane
B) Choroidal stroma
C) Descemet's membrane
D) Drusen
E) Sclera

Question 8

When auditory vibrations enter the cochlear duct, the _____ membrane remains stationary, resulting in a shearing action of the vibrating hair cells, leading to the stimulation of the cochlear nerve

A) Basilar
B) Reissner's
C) Sacular
D) Tectorial
E) Tympanic

Question 9

The membrane that separates the fluid-filled cochlear chamber from the air-filled middle ear, helping to regulate pressure in the inner ear, is called the _____

A) Cochlear duct
B) Cochlear membrane
C) Oval window
D) Round window
E) Tympanic membrane

Question 10

The photoreceptor neurons of the retina synapse on ____

A) Amacrine cells
B) Bipolar cells
C) Ganglion cells
D) Horizontal cells
E) Müller cells