Which of the following types of cell signaling describes how SCF and Flt3 ligand predominately regulate stem cell homeostasis?

The symbol + used with a CPT code indicates:

A. revised code. B. new code. C. new or revised text. D. add-on code.

Which one of the following medical emergencies would MOST likely result in the use of epinephrine by the AEMT?

A) Bee sting B) Cardiac arrest C) Slow heart rate D) Asthmatic episode