Which of the following substances or elements reinforces red blood cells, creating the final step in the formation of a blood clot?

The following results are obtained from a 38-year-old woman with congestive heart failure:

? Specimen: pleural fluid ? Fluid protein = 4.5 g/dl ? Serum protein = 9.5 g/dl ? Serum LD = 110 U/L ? Fluid LD = 60 U/L These results are most consistent with which of the following? a. Chylous effusion b. Exudate c. Transudate d. Normal pleural fluid

The heart block that causes "dropped" beats and that is often the result of increased parasympa-thetic tone is called _____ block

a. Sinoatrial c. First-degree atrio-ventricular b. Mobitz type I d. Left bundle branch