A patient tells the nurse that he is 65 years old and has not had a cold or any other type of infection for at least 30 years. The nurse realizes this patient most likely has:
1. Intact functioning MHC receptors.
2. An overabundance of white blood cells.
3. An enlarged spleen.
4. Engorged lymph nodes.
Intact functioning MHC receptors.
Rationale: Major histocompatiblity complex or MHC receptors on cells are one type of marker used by the immune system to determine if a cell belongs to the organism or not. Because this patient claims he has not had a cold or other inflammatory response for at least 30 years, the nurse can surmise that this patient's MHC receptors are well functioning. There is not enough information to know if the patient has an elevated white blood cell count. An enlarged spleen and engorged lymph nodes are signs of an infection or inflammatory process somewhere in the body.
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