Final Answer:
It takes the body 6 to 8 weeks to replace 500ml of blood, a process known as hemopoiesis, with blood plasma being replenished within 24 hours.(Option A)
Step-by-step explanation:
The body takes 6 to 8 weeks to replace 500ml of blood. This process is known as hemopoiesis or hematopoiesis, which is the production of all of the cellular components of blood and blood plasma. While the donated plasma can be replaced within 24 hours, the blood cells take longer to be fully replenished.
Hemopoiesis occurs primarily in the red marrow of the bones, and the limits on the frequency of blood donation reflect the body's need for this replenishment period. During this recovery period, the body diligently works to regenerate red and white blood cells, ensuring the maintenance of a healthy and balanced blood supply.