How to show, hide, or disable one header in a jQuery UI accordion widget?

How to show, hide, or disable one header in a jQuery UI accordion widget?

I'm building my first page using ANY jQuery UI. I have set up an Accordion Widget, and I would like to be able to hide or disable one of the lower headers in it based on some actions in an upper one. Also, to re-enable based on the same sort of thing.

I know how to detect the action that should trigger this to fire a function, but I don't know how, within the jQuery UI system, to hide (with animation would be nice) or disable (with dimming or something would be nice, but not expandable in any case) one of the headers in the Accordion.

Can this be done?

Troy