Diet is a huge part of workout. A person should have 1.5 grams of protein per pound per day. A 200lb guy should eat 300 grams of protein a day. Also, it should be split up between six meals. Lots of working out means you need lots of calories.
The quadriceps are bigger because it controls your thighs so it must be bigger in order to lift your leg. As where your biceps is a muscle that controls your arm and also has a muscle to help it move. So the quadriceps are bigger and stronger.
involuntary muscle
You cant!
it depends how tall you are and what your muscle and fat percentages are. one thing to remember is that muscle weighs more than fat does and the more muscle you have wont make you get bigger in size. a scale can determine how much you weigh but it cant determine how wide you are.
no you cant make one bigger.
the muscle is getting bigger because its pushing on the muscle behind it
you cant
No, if you have recently done strenuos exercise on that muscle and have a healthy diet your body will be repairing the muscle bigger and stronger
you cant
your heart is the muscle that you cant move yourself
Maybe it gets bigger?
Weight training creates micro-tears in your muscle fibers. When your muscle is repaired using proteins, they have the effect of becoming "bigger".