00:01
Okay, which of these has the correct sequence for how sounds triggers, triggers an impulse in the ear? so i'm going to write down a b, c, and z, and we're going to go through the steps.
00:14
So what we're looking at here is starting at the outer ear, working our way in.
00:19
So what do we hit first? what are the structures of the outer ear? well, we have the auditory canal, and then at the end of that we have the tympanum, and that leads into the middle ear.
00:30
So we're going to have one of these structures most likely to begin with.
00:35
And a couple of the answers have that.
00:37
So let's look for answers that have these further in.
00:41
For example, if you look at a, we have eardrum, bit tympanum, right at the end.
00:46
So that's not going to be possible because that's in the outer ear.
00:50
If you look at b, we have tympanum first, acceptable.
00:54
C, we have the auditory canal, then the tympanum, acceptable.
00:58
If we look at d, we look at d, we have.
01:00
We have the auditory canal after the hair cells.
01:03
So now we can roll out d as well, because that's not going to happen...