Question

how cells are used in the body quick check
are your heart cells the same as your brain cells? why or why not? (1 point)
no, different sections of the cells dna are \tuned on\ causing heart cells to have different characteristics from brain cells.
yes, the heart cell and the brain cell have the same function, therefore they are identical.
no, heart cells are stem cells that replicate and create brain cells, therefore they are two different types of cells.
yes, during mitosis, the resulting daughter cells are identical which means that all cells in the body are the same.

Explanation:

Cells in different organs like heart and brain have different functions. This is due to gene expression - different parts of DNA (genes) are active (expressed) in different cell types. Heart cells have genes expressed for functions like contraction, while brain cells have genes for functions like neurotransmitter release. Mitosis produces identical daughter cells during cell division in a single cell line, but as cells differentiate (become specialized) into different tissues (heart, brain etc.), their gene expression patterns change. Stem cells can differentiate into various cell types, but heart cells are not stem cells that create brain cells. Also, heart and brain cells have different functions (pumping blood vs processing information), so they can't be identical.

Answer:

No, different sections of the cells' DNA are "tuned on" causing heart cells to have different characteristics from brain cells.