Which of the following substances causes blood to clot?
a. prostaglandins
b. thromboxane A2
c. cyclooxygenase
d. prostacyclin
b. Thromboxane A2 is synthesized and found in platelets (component of blood that prevents clotting). When released from platelets, it is a potent vasoconstrictor of blood vessels and induces platelet aggregation (clumping) and prevents bleeding.
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Which of the following describes clinically significant weight loss?
A. A 1–2% decrease in body weight in 1 week B. A 10% decrease in body weight in 1 week C. A 20-pound decrease in body weight in 1 month D. A 10% decrease in body weight in 1 month
A medical office specialist can find clinical examples for documenting medical necessity in the:
CPT Index. CPT Appendix A. CPT Appendix C. CPT Guidelines.
An example of a subcellular microorganism is a ________.
A. helminth B. bacterium C. virus D. fungus E. protozoan
Which of the following differentiates an atrial rhythm from a sinus rhythm?
A) Tachycardia B) Profound bradycardia C) Dissociated P waves D) Varying shapes in P waves