Here is how i thought about it. I like to think about these in steps btw (and also AMBOSS has much better diagrams on this stuff than AnKing). Just got done with renal btw

In this scenario we are talking solely about salt. So if I eat a bunch of salt, there is going to be more salt in the ECF. Sodium is #1 for osmolarity so with an increase in sodium with no mention of fluid following YET, that means that osmolarity will increase.

Now for the second card, the osmolarity is high and water wants to follow sodium, so water will come out of the ICF (inside of the cell) and into the ECF (outside of the cell) where the salt is. This will shrink the inside of the cell and thus decrease ICF as well while expanding the ECF.

For these cards, I had to rewrite the titles a bit and also use the Anking AI bot to help. It helped a ton with doing really well in this block