Cardiovascular DYK questions Flashcards
What is not a major function of blood?
storage for calcium ions
There are ~280 million Hb molecules in one RBC. A single Hb molecule carries ______ molecule(s) of O2, which means that a single RBC carries about ______ O2 molecules
4 ; 1 billion
Following surgery for stomach cancer, joe has been diagnosed with pernicious anemia. Which of the following is most likely the cause of this problem?
He has iron deficiency anemia because of his cancer
Which condition below would stimulate the release of erythropoietin (EPO)
hypoxia produced by high altitude
What is the nature of and purpose of surface antigens on RBCs?
Integral membrane glycoproteins; substances your immune system recognises as ‘normal’ or ‘self’
Andrew has blood type AB. What type of blood can he receive from a donor?
Any blood type; he has no antibodies to A or B antigen in his plasma
Why cant a person with type A blood safely receive blood from a person with type B blood?
- Mixing blood types causes infection in the recipient
- The A antibodies in type A’s plasma would react with type B’s donated blood
- Type B blood would agglutinate in the recipients blood vessels and plug small vessels to vital organs
Although it is true that arteries carry ____, it is NOT always true that they carry ____ blood
Blood away from the heart ; O2 rich
Doris was born with a malformed pulmonary valve. How will that affect her circulation?
Blood will flow back into her right a ventricle
On an ECG reading, what does the P wave indicate?
Atrial depolarisation
Which of the following is a unique characteristic of arteries, when compared to veins?
Arteries contain an internal elastic membrane in their tunica intime
Why is venipuncture a common technique for obtaining a blood sample?
- Blood pressure is relatively low in veins
- Superficial veins are easy to locate
- Venous walls are thinner than arterial walls
