Firstly, we know it's impossible to change the shape of a muscle through exercise.
The muscles of the lower extremities compared to the upper torso respond differently to exercise.
If we use a barbell curl and hold it in mid range, your useable strength will be depleted quite quickly, with a calf raise in the same position and with a considerably amount of weight you could hold that position for quite some, much longer than you could with the curl in the mid range position.
Using this analogy, it stands to reason that the lower extremities require higher rep ranges compared to the upper body.
Using a weight that you could do 10, perform 20, 40! Or even 50! These muscle would respond, one set to fatigue would be enough, but having said that.
John mc Cullum wrote; Back exercises, like squats, have a growing effect on the rest of your body....
So, I say;
When one muscle grows in response to exercise, the entire muscular structure of the body grows to a lesser degree...the larger the muscle...the greater the indirect effect.