Which structures allow blood to pass through a capillary bed even when the precapillary sphincters are closed? O arterioles and small veins O continuous capillaries O blood can't pass through a capillary bed unless the precapillary sphincters are open O metarterioles

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A: INTRODUCTION Answer of question number 1 &2 is given below.

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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.