I am supposed to identify each op amp component within the circuit

working from the right side to the left side

U-3b = non-inverting amplifier
U-3a =
U-3c = difference amplifier
U-3d =

im having some difficulty with the others

would it make sense for a high and a low pass filter to be in an amplifier circuit?

 

U3 a d c are not in the direct 'audio' path. R3 should clue you in to the other function being performed

 

Hello,

U3a is also an amplifier (wich type is asked).
U3d is a comparator as squelch (R3 sets the squelch level).

See this page for more info on the squelch:
http://www.rentcom.com/wpapers/telex/telex6.html#squelch

Bertus

 

Hello,

A squelch can be used (for example in a FM reciever when searching a station) to block the noise when no input signal (or low noise) is present.

Bertus

 

Ack! It's backwards! I'm paralyzed! (Why is it right-to-left? Is this convention used elsewhere?)

 

U-3b = non-inverting amplifier
U-3a = inverting amplifier
U-3c = difference amplifier
U-3d = comparator

 

Hello,

U3a is not correct.

See this page for the analogy:
http://www.allaboutcircuits.com/vol_3/chpt_8/6.html

Bertus

 

so U3-a is just a non-inverting amplifier with divided feedback?

 

It's the divided resistor network which set the gain of that stage. ??

It should be one of the first things you learn about op amps. How to determine the gain.