HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Only 1
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1, 3 & 4
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2 & 3
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only 4
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Detailed explanation-1: -Reason: RBCs or Erythrocytes are biconcave enucleated blood cells. It contains hemoglobin which help to carry out oxygen through the body. The main reason behind lacking nucleus is that it can contain hemoglobin which in turn, helps it in gaseous transport.
Detailed explanation-2: -The answer choice that is NOT characteristic of mature red blood cells is a. Fe++ molecules degrade quickly limiting life span. Iron molecules do not degrade quickly and instead are recycled and used after blood cells die to create more hemoglobin for other blood cells.
Detailed explanation-3: -Almost all vertebrate organisms have hemoglobin-containing cells in their blood, and with the exception of mammals, all of these red blood cells are nucleated. In mammals, NRBCs occur in normal development as precursors to mature red blood cells in erythropoiesis, the process by which the body produces red blood cells.
Detailed explanation-4: -Nearly 70% of carbon dioxide is carried by the blood as bicarbonate, 20-25% as bound to RBCs, and around 7% in a dissolves state through plasma. However, in the case of oxygen, nearly 97% is transported by RBCs (as bound to haemoglobin), while the remaining 3% is carried in a dissolved state through the plasma.