Audio recordings from BMSC2118: Neurobiology in the Faculty of Biological Sciences at the University of Leeds https://minerva.leeds.ac.uk/webapps/lobj-podcast-bb_bb60/feed/+MjAxMTEyXzI1OTUzX0JNU0MyMTE4+/podcast.xml
The last few slides of this lecture are important and shouldn't be ignored - here is an audio recording to help understand them.
Here is the recording of the lecture on ionotropic receptors.