Question

Explain how the organism of a blood donor would respond to providing 500 ml of blood. What are the responses that ensure that the donor's blood pressure stays relatively stable?

Answer 1

After donating 500 ml of blood, one gets to feel more light than usual and this is all bevause of the fact that there is a lowering of blood sugar to the brain and with the loss of sugar levels, there can be symptoms which include nausea, headache, shakiness, hunger etc. Blood pressure is indeed constantly put under observation by the aid of the baroreceptors and it is actually regulated by the heart frequency and vasoconstriction. In this case, immediately after donating blood, the blood vessels will contract slightly to maintain blood pressure. Hence at this instant, your kidneys will make some hormones, which cause you to urinate a bit less, to retain water, and this could get to bone marrow produce more blood cells. Therefore, when you urinate less than usual, it can be mentioned that the donor's blood pressure stays relatively stable.