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

  5. contain the respiratory pigment hemoglobin along with myoglobin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

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