Hearing (1)

Question 1

What are the 2 types of sound fields and what are their defining characteristics?

Answer 1

Near field - close to sound source - pressure and particle velocity not in phase
Far field - far from sound source - pressure and particle velocity in phase

Question 2

What are the elementary units of chordotonal organs in antennal ears?

Answer 2

Scolopodia

Question 3

Why is the opening of mechanically-gated ion channels in antennal ears non-linear?

Answer 3

Force and displacement not directly proportional

Due to recoil causing overshoot

Question 4

When is mechanically-gated ion channel stiffness lowest (gating compliance)?

Answer 4

When the channel opens

Question 5

What are the roles of the adaptation motor in the Drosophila flagellum?

Answer 5

Closes open ion channels despite continuous stimulation - flagellum stiff at rest so easily disturbed by movement of insect
Shifts best-detected frequency to most useful for species

Question 6

What receives input from the scolopodia?

Answer 6

Johnston’s organ