The heart is a mechanical pump that is stimulated to contract by the sinoatrial node

A 2-year-old black male was being evaluated at County Clinic for swollen hands and feet that were extremely painful. Upon physical examination, the child was found to have a fever and hepatosplenomegaly and was physically small for his age

The child was of Jamaican descent. Patient history revealed that the child's birth weight was normal, but since then, he had been consistently underweight and undersized for his age group. Family history was not readily available. The physician had the child admitted to the hospital for workup and ordered the following CBC. TEST RESULTS WBC 16.6 x 109/L RBC 2.53 x 1012/L HGB 7.5 gm/dL HCT 21.4% MCV 84.6 fl MCH 18.9 pg MCHC 35.0 g/dL RDW 18.9 PLT 511 x 109/L Differential: Polys 84% Stabs (bands?) 10% Stab not commonly used Lymphs 5% Eos 1% NRBCs 12 This patient presented with swollen hands and feet. This patient suffering from what kind of crisis? a. Vaso-occlusive b. Oxidative c. Transfusion reaction d. Anaphylactic reaction

Which of the following is one of the three basic types of railcar configurations that fire fighters should be able to recognize?

a. Intermodal b. Hazardous waste c. Compressed gas d. Special use