Pancreatic beta cells secrete the protein hormone insulin in response to various signals. Which of the following is/are true of these cells?     a)  They would have high concentration of insulin stored in membrane-bound vesicles adjacent to the plasma membrane.   b)  They would contain more mitochondria than an average cell.   c)  They participate in regulated secretion.   d)  a and c   e)  a, b and c

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.