A 71-year-old male patient with a history of myocardial ...

[imowrer]

A 71-year-old male patient with a history of myocardial infarction (MI) and peripheral vascular disease (PVD) has been advised by his family physician to begin taking 81 mg aspirin once daily.
 
  Which of the following statements best captures an aspect of the underlying rationale for the physician's suggestion?
  A)
  Platelet aggregation can be precluded through inhibition of prostaglandin production by aspirin.
  B)
  Aspirin helps to inhibit ADP action and minimizes platelet plug formation.
  C)
  Aspirin can reduce unwanted platelet adhesion by inhibiting TXA2 synthesis.
  D)
  Aspirin inhibits the conversion of fibrinogen into fibrin and consequent platelet plug formation.

Question 2

A surgeon is explaining to the parents of a 6-year-old boy the rationale for the suggestion of removing the boy's spleen. Which of the following teaching points would be most accurate?
 
  A)
  Ferritin is the activated and usable form of iron that your red blood cells can use to transport oxygen.
  B)
  Ferritin is a stored form of iron that indirectly shows me whether you would benefit from iron pills.
  C)
  Ferritin is a protein-iron complex that allows your red blood cells to make use of the iron that you consume in your diet.
  D)
  Ferritin is the form of iron that is transported in your blood plasma to red blood cells that need it.

[covalentbond]

Answer to Question 1

Ans:
A

Feedback:

Aspirin prevents platelet plug formation by inhibiting synthesis of prostaglandins that mediate clot formation. Aspirin does not influence ADP, TXA2 synthesis, or fibrinogen conversion.

Answer to Question 2

Ans:
B

Feedback:

Ferritin is the protein-iron complex that is stored in tissues, especially the liver, and the serum levels can be used as an indicator of the need for iron supplements. It is not accurately characterized as an activated form of iron, nor does it mediate the actual use of iron by erythrocytes. Transferrin, not ferritin, is transported in plasma, and it is associated with iron storage.