It is certainly possible to have a dropdown selection result in the population of other dropdowns, generate the texts for different table cells, and so on. The https://www.msofficeforums.com/word-...own-lists.html thread already discusses the latter.

For Dependent Dropdown Content Controls, see:
Help with cascading dropdown list

For Hierarchical Dropdown Content Controls, see:
Creating a reducing drop down list

Getting all this to work the way you want in the one document can be a challenge - especially if you don't have a coding background.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]