chapter 17 A and P

Perilymph is located in the 1. scala tympani 2. cochlear duct 3. bony labyrinth of the semicircular ducts

1 and 3

Place the flow of tears in correct order. 1. lacrimal gland 2. lacrimal sac 3. lacrimal duct 4. superior or inferior lacrimal canal 5. nasolacrimal duct 6. nasal cavity

1, 3, 4, 2, 5, 6

What is the correct order of events of sound transmission through the ear? 1. sound waves strike the eardrum 2. the ear ossicles vibrate 3. hair cells of the organ of Corti vibrate 4. the perilymph in the cochlea moves 5. sound waves enter the external auditory canal

5, 1, 2, 4, 3

Which is NOT an event that occurs during the process of gustation? A. salty foods trigger opening of the sodium ion channels B. a tastant is dissolved in saliva C. the site of taste transduction occurs at the basal cells D. hydrogen ion channels are triggered by sour foods E.depolarization causes release of neurotransmitters

C. the site of taste transduction occurs at the basal cells

__________ bind the odorants and begin signal transduction.

Olfactory cilia

The cis to trans conversion of retinal when photopigments respond to light is called:

The cis to trans conversion of retinal when photopigments respond to light is called:

Which of the following are responsible for producing new olfactory receptors?

basal cells

The hair cells responsible for hearing are located on the ________; their hair bundles are embedded in the ________

basilar membrane; tectorial membrane

cones allow what?

color vision

Select the correct pathway of sound waves from the auricle to the spiral organ of Corti?

external auditory canal → tympanic membrane → maleus → incus → stapes → oval window → perilymph

which area contains only cones?

fovea centralis

Axons of which cells make up the optic nerve?

ganglion cells

Cataract leads to blindness due to

loss of transparency of the lens.

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

olfactory tract; cerebral cortex and limbic system

Which of the following describes the correct sequence of events of an olfactory receptor reacting to an odorant?

production of cAMP - opening of sodium ion channels - depolarization - generation of nerve impulse

There is a white outer covering of the eye known as the

sclera

Dynamic equilibrium is maintained by the

semicircular canals

Olfactory epithelium is found only in the

superior portion of the nasal cavity.

What is the function of the iris?

to control the amount of light entering the eye

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

tympanic membrane

Which of the following form an inverted v-shaped row at the back of the tongue?

vallate papillae