iClicker Final Review

Question 1

Which of the following sensory cortices is NOT organized according to some clear principle of the stimulus (i.e. topographically mapped)?

Answer 1

Olfactory Cortex

Question 2

What is the function of the ear canal?

Answer 2

Amplifies certain frequencies

Question 3

This ion is responsible for depolarizing hair cells…

Answer 3

K+
Potassium

Question 4

Which of the following statement about the vestibular system is false?
Movement of the head causes fluid semicircular canals to deflect the cupula
Embedded in the cupola are the sterocilia of hair cells
Movement of the stereo cilia causes tip links top open

Answer 4

Movement of the stereocilia

Question 5

An airplane is flying directly over your head. Which semicircular canal will you activate when watch it fly over?

Answer 5

Superior (Anterior) and Posterior canals

Question 6

Which of following is false.
Vestibular information is transmitted to the brain via the vestibule-cochlear nerve
The transduction of vestibular information involves tip-links which open potassium channels
Vestibular thalamocortical pathway sends vestibular information to high brain regions
Head movement are perceived in the vestibular cortex

Answer 6

Head movement are perceived in the vestibular cortex

Question 7

Which of the following statements is false?
Cell bodies of the tactile receptors are located just outside the spinal cord
Somatosensory nerve trunks are soma topically organized
Touch information is primarily carried in the dorsal column-medial lemniscus pathway
Pain information is primarily carried in the spinothalamic pathway

Answer 7

E. all correct

Question 8

What is the name of the mechanoreceptors that transduce pain information?

Answer 8

Nociceptor

Question 9

What is the function of the PAG in reducing pain?

Answer 9

The PAG modulates ascending pain information indirectly through several hindbrain regions

Question 10

Which of the following cell types is thought to be responsible for transducing Bitter tastants?

Answer 10

Type II

Question 11

Which of the following cell types is thought to contribute to the maintenance of the taste bud?

Answer 11

Type I

Question 12

This brain region is primarily responsible for the perception of salty.

Answer 12

Insular Cortex
-perception of gustatory information

Question 13

Which of these two cell types send their axons to the olfactory cortex?

Answer 13

Mitral and Tufted cells

Question 14

Where are Granule cells located?

Answer 14

Olfactory bulb

Question 15

What is the function of the round window in your auditory system?

Answer 15

Relieves pressure in the cochlea

Question 16

Which ion plays a critical role in vesicle fusion and the neurotransmitters being ‘dumped’ into the synaptic cleft?

Answer 16

Ca2+ (Calcium)

Question 17

All the auditory nerve fibers join the vestibular nerve fibers to form…

Answer 17

Vestibularcochlear nerve

Question 18

This brain region is part of the thalamus and plays a role in auditory attention?

Answer 18

Medial Geniculate Nucleus

Question 19

This structure’s only function is to help localize and funnel sound.

Answer 19

Pinna

Question 20

Neurons communicate at junctions called _?

Answer 20

Synapses