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Describe normal erythrocytes. select all that apply

a. have a complex nucleus
b. contain mitochondria and other organelles
c. have a biconcave shape
d. contain hemoglobin to transport gases like O2

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Final answer:

Normal erythrocytes are biconcave in shape and lack a nucleus and organelles, which provides more space for hemoglobin, the protein that transports oxygen and carbon dioxide.

Step-by-step explanation:

Normal erythrocytes, also known as red blood cells, have several key characteristics:

  • biconcave shape - Erythrocytes are biconcave discs. This shape increases their surface area relative to their volume, which facilitates efficient gas exchange.
  • lack of a nucleus and organelles - Mature erythrocytes do not contain a nucleus or other organelles such as mitochondria. This optimizes space within the cells for a higher concentration of hemoglobin, thereby maximizing their oxygen-carrying capacity.
  • hemoglobin content - Erythrocytes contain a large amount of hemoglobin, a protein responsible for the transport of oxygen (O2) and carbon dioxide (CO2) in the blood.

Therefore, the correct options describing normal erythrocytes are that they:

  • c. has a biconcave shape.
  • d. contains hemoglobin to transport gases like O2.
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