Multiple choice

In humans, the red blood cells

  1. are secreted into the circulation as immature cells known as reticulocytes

  2. have life span of about 10 days

  3. depend on mitochondria for their ATP synthesis

  4. are formed by budding off megakaryocytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This statement is correct. Reticulocytes are young, anucleate red blood cells,  which are released from bone marrow into the blood in increased numbers as a response to anemia.

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