Week 6 - Lab

Question 1

What is the shape of rhodopsin in low light?

Answer 1

All-trans-retinal

Question 2

What is the second messenger in phototransduction?

Answer 2

cGMP

Question 3

What type of signal do bipolar cells send?

Answer 3

EPSPs

Question 4

Damage to the right nasal hemiretina causes loss of what part of the visual field?

Answer 4

right temporal

Question 5

What is the middle bone of the 3 in the middle ear?

Answer 5

Incus

Question 6

What fluid is found in the vestibular canal and Tympanic canal?

Answer 6

Perilymph

Question 7

Which membrane vibration on the organ of corti leads to sound perception

Answer 7

basilar membrane

Question 8

Auditory ossicles amplify sound waves by how many times?

Answer 8

20x

Question 9

Do low-pitch sounds stimulate the distal or proximal portion of the organ of Corti?

Answer 9

Distal

Question 10

What structures has CaCO3 associated with their structure & function?

Answer 10

utricle & saccule

Question 11

What is optokinetic nystagmus?

Answer 11

tracking a moving object, saccades & smooth pursuit

Question 12

If zonulas are taught, what is the lens, ciliary muscles and eye doing?

Answer 12

Lens is flat
Ciliary muscle is relaxed
Eye is ready for distance vision

Question 13

What do Pacinian corpuscles do?

Answer 13

Heavy pressure cutaneous receptors

Question 14

What is the touch detection, and density of receptors of the back?

Answer 14

Touch detection threshold is high
Density of receptors is low