Does a 250lb person have more cells than a 150lb person?

Answer 1

Maybe, but in a normal case there would not be a significant number more. Certain cells like nerves, muscles, and fat cells do not multiply or multiply infrequently. In the case of muscles and fat cells the cells themselves get bigger by increasing the mass of protein(muscle) or fatty acids (fat cells) contained within the cell as they grow, but they do not divide. So a person could be significantly heavier, but have the same number of cells as someone else.

In the case of an individual with an uncontrolled tumor, they might have millions more cells than someone else because the tumor is a rapidly growing and multiply group of cells.