The educational objective for Qid 19289 states, “Patients of advanced age have increased bone marrow fat and reduced bone marrow mass, leading to impaired bone marrow reserve. This results in an inability to rapidly generate new blood cells in response to acute stress (e.g., blood loss, hypoxia).” The information pertinent to selecting the correct answer is in this note’s “Extra” field. The question prompt asked, “Which of the following age-related processes best explains the observed findings [seen in older patients with low reticulocyte count and longer recovery times in response to acute traumatic blood loss compared to younger patients]?”. The correct answer choice was “decreased bone marrow mass.”