When playing heads up do you feel it is the right play to see every flop preflop?????

if you have 10 7 off and you openent pots it preflop do you call???

If the flop come q 7 3 and you had put them on AQ or AK do you shove vs thier postflop pot bet???
you are 50/50 to win if you had them on AK or AQ