How Does a Stem Cell Become a Heart Muscle Cell

question 61

Multiple Choice

How does a stem cell become a heart muscle cell, and once it does, can it change to another type of cell?

• A) Genes direct differentiation of a single embryonic stem cell into a cardiac muscle cell, and that cell replicates to grow into a heart; no, the process cannot be reversed.
• B) Genes direct differentiation of a single embryonic stem cell into a cardiac muscle cell, and that cell replicates to grow into a heart; yes, the process can always be reversed.
• C) The stem cells differentiate into an outer population, some of which differentiate into muscle cells, and some of those differentiate into heart muscle cells; yes, the process can always be reversed.
• D) The stem cells differentiate into an outer population, some of which differentiate into muscle cells, and some of those differentiate into heart muscle cells; no, the process cannot be reversed.
• E) One of the stem cells is destined to be a heart muscle cell, so it gradually differentiates into that and then replicates; no the process cannot be reversed.

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