Final answer:
The student is in the exhaustion stage of the general adaptation syndrome after experiencing prolonged stress from their studies and showing signs of physical and mental resource depletion.
Step-by-step explanation:
The student in the given scenario is likely in the exhaustion stage of the general adaptation syndrome (GAS). GAS, as introduced by Hans Selye, consists of three stages: the alarm reaction, the stage of resistance, and the stage of exhaustion. The exhaustion stage manifests when prolonged stress is not alleviated, and the individual's physical and mental resources become depleted. In this case, after the intense stress of barely passing Anatomy 101, the student's prolonged rest and avoidance of social interaction suggest a progression to the exhaustion stage, which is a response to the chronic stress experienced during the course.