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(Answered) Human Anatomy and Physiology 1 Homework 31

Question 1

A few sensory receptors are listed below. Select each one that is NOT a neuron, but is instead a modified epithelial cell. This question has multiple correct answers.

Answer Choices:
semicircular canal crista ampullaris hair cell

vestibular macula hair cell

taste cell

olfactory receptor neuron

spiral organ hair cell

Question 2

Every sensory receptor has to produce a generator potential to activate the next cell in its pathway (or itself).  The sensory receptors for the somatic senses are true neurons, with their cell bodies typically within the [2].  Meanwhile, the only special senses receptor that is a true neuron with an axon is the [3].  For example, taste cells are [4] that exist entirely within the [5].  Each sensory receptor is activated by specific stimuli, so that [6] are activated within the cochlea by a [7] that causes a [8] of their hairs, while [9] in the semicircular canals are activated by [10] that causes [11] to push on their hairs.  Some sensory receptors can only be [12] by their stimuli, while others, like the vestibular sensory receptors, can be [13] by their stimuli.  When a sensory receptor does not have an axon, it has to synapse onto a neuron in order to send the information back to the [14].  For example, a taste cell for sweet tastes will most likely synapse onto a sensory neuron that will carry the information back through the [15] nerve.

All Answer Choices

dorsal root ganglia
depolarized or hyperpolarized
modified epithelial cells
movement of the head
specific sound frequency
generator potential
crista ampullaris hair cells
mechanical bending
olfactory receptor neuron
auditory hair cells

Question 3

Hair cells in the cochlea are [1] by sound, while hair cells in the vestibular organs are [2] by head movements. Either way, the change in potential is due to the action of [3]-gated channels.  The stereocilia on the hair cells are [4] to cilia.

All Answer Choices choose one:
depolarized only
hyperpolarized only
depolarized or hyperpolarized

Question 4

Head movement is sensed by the _______________ .

Answer Choices:


semicircular canals

otolithic membrane

Question 5

High frequency sounds ______________________________ .

Answer Choices:
vibrate the basilar membrane near its base

vibrate the basilar membrane near its middle

vibrate the basilar membrane near its apex

All of the above.

Question 6

Muscles that protect the  eardrum from very loud impact sounds are located in the ______________________ .

Answer Choices:
external ear

middle ear

inner ear

spiral organ of Corti

Question 7

Presbycusis is ____________________ .

Answer Choices:
a type of sensorineural deafness common in people over 65 years of age

something that results from an atrophy of the spiral organ

a type of deafness that leads to a loss in the ability to hear high tones

All of the above are correct.

Question 8

Sound wave localization is achieved by the brain calculating  _______________________________ .

Answer Choices:
interaural time difference

interaural time difference but not the interaural intensity difference

interaural intensity difference

interaural intensity difference but not the interaural time difference

Question 9

When a hearing test is conducted on both right and left ears which of the following would be expected?

Answer Choices:
Sounds arriving from spots equidistant from both ears arrive with equal loudness at each ear.

Enough information is provided to locate the position of the item making the noise.

This allows for optimal localization of all sound waves being done in this examination.

All of the above are correct.

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