BNNS501 TUTORIAL 9 Questions with Complete Correct Answers | Grade A+

functions of blood Ans: Transport (o2 from lung and co2 to, waste from cells to kidneys), regulation (pH through buffers 7.35-7.45, body temp), protection (antibodies and WBC to destroy pathogens, haemostasis to prevent excessive blood loss) 7 components of blood Ans: proteins, water, platelets, leukocytes, erythrocytes and other solutes structure of red blood cells Ans: carries o2 and haemoglobin, biconcave discs, no nucleus or organelles, confined to blood vessels and contributes to blood viscocity relationship between haemoglobin, iron, oxygen and erthyrocytes Ans: haemoglobin protein with 4 haem molecules, each molecule contain Fe2+ which can bind with oxygen and carries 4 oxygen molecules to be saturated 2 homeostatic mechanism for regulating rbc production Ans: kidneys detect low level of oxygen in the blood producing erthroprotein (epo) into blood and bone marrow, this stimulates the rbc production which goes to normal rate when oxygen levels are met haematocrit Ans: percentage of whole blood that is made up by rbc average blood volume for male and female Ans: female 4-5l, male 5-6l how is red blood cells broken down Ans: through macrophages