Karius - Senses

Question 1

What connects stereocilia to one another so they move as a cohesive group?

Answer 1

Tip link protein

Question 2

What happens when the stereocilia are bent towards to kinocilium?

Answer 2

K channels are opened and the hair cell depolarizes (K rushes in, is dominant ion in endolymph)

Ca is also involved

Question 3

What is impedance matching?

Answer 3

Occurs in the middle ear, job of the ossicles is to transmit accurate wavelength vibrations from the outer ear air conduction to the fluid-filled inner ear

Question 4

Our body has a reflex that maintains our vision in what plane?

Answer 4

Horizontal, along the horizen

Question 5

What is most of the cortical and cerebellar input in the vestibooptic reflexes attempting to do?

Answer 5

Override the reflexes and allow for voluntary movement

Question 6

What is the neurotransmitter photoR’s release? When does this happen (what shuts it down)?

Answer 6

Glutamate

Occurs in the absence of light (the dark!)