Model Growth and Repair Processes Practice Test

Heart muscle heals poorly because differentiation happens too fast, so no cell division is ever needed in either tissue.

Skin heals because its cells can divide by mitosis and produce replacements that differentiate into skin cells; heart muscle has far less ability to replace lost cells through division and appropriate differentiation.

Skin heals because skin cells never die; heart muscle heals poorly because its cells have different DNA.

Skin heals because it uses meiosis to quickly make many new cells; heart muscle cannot perform meiosis.