This is exactly what im doing...right now..this minute. Daytonite is right DO NOT COMPARE the S/S for each or else you will get confuse. This is how i did it. First try understand what they regulate and then associate the S/S. For example:
Sodium: water balance, nerve impulse transmission, regulation of acid-base balance and participation in cellular chemical reactions.
S/S: nerve impulse transmission : convulsion, coma, personality change
water balance: vomiting, nausea, diarrhea
Hypernatremia (think of it as dehydration)
S/S: water balance: dry, flushed skin; extreme thirst; dry mucous membranes
Nerve impulses: convulsion, agitaion, irritability
and So on.....hope it helps