The ovaries, they produce and release ovum.
So its acquired immunity and the cells responsible are the B lymphocytes that produces antibodies against the virus. Memory is keep since first encounter of the virus by the immune system by way of the antibodies that was initially produced. The antibodies are there already, which makes it fast to act upon when expose again.
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Answer:
If David does not have any problems to properly perform his gluconeogenesis or glycogenolysis, which is the formation of glucose from our reserves in the liver, he should have optimal glucose levels.