LAB - Special Senses

Question 1

Label

Answer 1

1- incurrent aperture of nares
2- excurrent aperture of nares
3- ampullae of Lorenzini

Question 2

What kind of scales do sharks have?

Answer 2

placoid scales

Question 3

What are the sides of the dogfish shark called?

Answer 3

lateral lines

Question 4

What is this structure?

Answer 4

cribriform plate of ethmoid bone

Question 5

Answer 5

frontal sinus

Question 6

Answer 6

nasal passage

Question 7

Answer 7

internal auditory meatus (foramen for CN VIII)

Question 8

Answer 8

sella turcica

Question 9

Answer 9

vomeronasal organ

Question 10

Answer 10

auditory bullae

Question 11

Answer 11

bovine tongue
1- epiglottis
2- vallate papillae
3- filiform papillae
4- fungiform papillae

Question 12

What is this and what are the parts?

Answer 12

foliate papillae
1- papilla
2- epidermis

Question 13

Answer 13

foliate papillae
3- dermal papillae
4- taste buds with taste pores

Question 14

Answer 14

1- scala tympani
2- scala media
3- scala vestibuli

Question 15

Rectus eye muscle directions:

Answer 15

1. medial rectus - eyes looks medially
2. lateral rectus - eye looks laterally
3. superior rectus - eye looks up & lateral
4. inferior rectus - eye looks down & lateral

Question 16

Oblique eye muscle directions:

Answer 16

1. superior oblique - eye looks down & medial
2. inferior oblique - eye looks up & medial

Question 17

Answer 17

tapetum lucidum

Question 18

Answer 18

Pacinian corpuscle
1- lamellae (connective tissue)
2- sensory neuron

Question 19

Answer 19

Retina
-above this is sclera
1- choroid
2- pigmented layer
3- rods and cones
4- posterior cavity (vitreous chamber)
5- retina

Question 20

Identify A-C

Answer 20

a- scala vestibuli
b- scala media
c- scala tympani

Question 21

Identify 1-5

Answer 21

1- tectorial membrane
2- hair cells
3- vestibular membrane
4- organ of corti
5- basilar membrane

Question 22

What is at the pointer?

Answer 22

Meissner’s corpuscle

Question 23

Process of sound transduction:

Answer 23

1. sound waves vibrate tympanic membrane
2. vibration of middle ear ossicles
3. stapes vibrates oval window making waves within perilymph of vestibular duct (air vibrations to fluid vibrations)
4. vibration of tectorial membrane bends hair cells in the cochlear duct with stimulation of cochlear branch
5. action potential to vestibulocochlear nerve via cochlear branch
6. vibrations transfer into tympanic duct and dissipate into middle ear at round window

• all this goes from temporal lobe auditory cortex then to auditory association area